Chapter 2: The Underground Tunnel Collapse
The village huddled under the snow like a shivering animal. Levi hated places like this—too quiet, too full of the kind of desperate hope that made people whisper about legends. The air was sharp with pine and the ever-present woodsmoke that clung to the timber houses. Their informant was an old man with milky eyes and fingers knotted from a lifetime of labor. He spoke of his grandfather’s stories, of a passage older than the Walls, a secret vein in the earth.
“It’s a fool’s errand,” Levi stated, his breath a white plume in the frozen air outside the old man’s hut. He scanned the tree line, the silent, snow-laden firs. “Ancient maps are just old mistakes.”
“Erwin doesn’t think so,” Amiya replied, adjusting the straps of her gear. The bulky pack sat awkwardly over the now-healed scar on her side, a constant, dull reminder. “Abnormal Titan activity, then a historical lead in the same sector? It’s not a coincidence. It’s a pattern.”
“It’s a waste of time.”
“Then let’s be efficient about wasting it.”
She’d gotten bolder since the wall, since the infirmary. There was a new edge to her, a flinty quality that met his granite without flinching. It was irritating. Occasionally, very occasionally, it wasn’t.
The entrance wasn’t a grand arch. It was a crack. A jagged, dark seam in a rocky outcrop half a mile from the village, concealed by a thicket of dead brambles. It looked less like a secret tunnel and more like a geological afterthought. It smelled of damp rock and deep, perpetual cold.
Levi went first. The world narrowed to the circle of lantern light, the scrape of their boots, the sound of their own breathing echoing back at them. The passage was tight, forcing them to move single file, sometimes sideways. The ceiling dripped. The air grew heavier, tasting of iron and age.
“This isn’t man-made,” Amiya murmured, her voice hushed by the weight of the earth above them. She ran a gloved hand along the wall. “This is volcanic. A lava tube.”
“Great. So we’re inside a dead volcano. That’s reassuring.”
They moved deeper. An hour. Maybe two. Time stretched and compressed in the darkness. The tunnel began to slope downward, then opened abruptly.
The lantern light faltered, then surged, swallowed by a vast, impossible space. They stood at the mouth of a colossal cavern. The ceiling was lost in shadow, but stalactites descended like stone teeth, some as thick as ancient oaks. A still, black lake pooled in the center, reflecting their feeble light. The air here was different—still and cold and ancient, with a faint, acrid tang.
“This is it,” Amiya breathed, her eyes wide. She unshouldered her pack, pulling out the brittle, hand-drawn map from the old man. “The description matches. The ‘Lake of Reflection.’ The path should continue on the other side.”
Levi said nothing. His eyes were on the ceiling, tracing the strange, rippled patterns in the rock. He took a few steps forward, his boots crunching on the peculiar, brittle scree covering the cavern floor. It wasn’t loose stone. It was a layer of thin, shell-like rock fragments.
“Don’t,” he said.
But Amiya was already stepping out, her focus on the map, on the far wall. “If we skirt the lake, we can—”
The sound was a low, deep groan, like a giant shifting in its sleep.
It came from above.
Levi’s head snapped up. A network of fine cracks, invisible in the poor light, suddenly spiderwebbed across a massive section of the cavern roof. The brittle scree on the floor was the debris from a thousand smaller collapses. A warning they’d missed.
“Amiya! Back!”
The groan became a roar. A single, huge stalactite broke free, plummeting like a stone spear. It struck the lake with a colossal, concussive splash, but the damage was done. The impact was a seismic shock.
The ceiling above them decided to follow.
It wasn’t a collapse. It was an avalanche in reverse. A whole section of the cavern roof, tons of rock, detached and fell. Levi moved on pure instinct. There was no time to reach her, to pull her back. The only vector was forward. He fired his anchors not up, but across the cavern, the hooks biting into a robust-looking stalagmite near the far wall. He shot across the open space as the world dissolved into thunder and dust.
He landed, turned, and saw nothing.
A solid, choking wall of dust and debris filled the space where they’d entered. The rumble subsided into a terrible, final silence, broken only by the patter of settling pebbles and the slow drip of water. His lantern, left behind, was gone, buried. The only light came from Amiya’s, which now lay on its side, casting wild, tilting shadows from behind the new mountain of rock that now sealed the cavern.
“Ito.” His voice was flat in the immense silence.
No answer.
He called again, louder. “Amiya.”
A cough. Then a ragged inhale. “Here.” Her voice was muffled, strained. “I’m here.”
She was on the other side. The collapse had divided the cavern. He was near the far wall, where the supposed exit was. She was trapped near the entrance, with most of the supplies. Both packs had been with her.
“Status,” he called, his mind already calculating, discarding, calculating again.
“I’m… alright. The main fall missed me. Some glancing debris. My light is intact.” A pause. He heard the shifting of rock. “The way back is completely blocked. Levi, it’s… it’s solid.”
He already knew. The acoustics told him. The fall was dense, packed. “Your side. Look up. Is the ceiling stable?”
A longer pause. He imagined her, covered in dust, green eyes scanning the shadows above her with desperate intensity. “It looks… intact. For now.”
“The pack. What’s left?”
He heard the rustle, the unclipping of straps. Her voice, when it came, was carefully controlled. “My pack is here. Food for two days. Ration bars, dried meat. One canteen, half-full. The water purifier is with you.”
He glanced at his own hip. A single, full canteen. A knife. His ODM gear. No food. No purifier. “I have my gear. One canteen.”
Silence again. This time it was thick, heavy with the new reality. Trapped. Limited food, limited water. No clear way out.
“Your side,” she said, her voice firmer, slipping into analysis. It was her coping mechanism. “The map indicated the continuation was on the far side. Do you see it? A passage?”
He lifted his gaze, pushing the situation down, locking it away. He had to inventory. The cavern on his side was smaller, a dead end except for one feature: a dark, vertical fissure in the wall, just wide enough for a person. It was not the promised tunnel. It was a crack. It led into darkness, possibly nowhere.
“There’s a fissure. It’s narrow. Unknown depth or destination.”
“Can you climb it?”
“Unknown.” He approached it, peering inside. The air that whispered out was slightly warmer, carrying a different smell—not damp rock, but something dry, almost dusty. “The air moves. It goes somewhere.”
“Then that’s your route.” She said it with finality.
“Our route,” he corrected, his tone leaving no room for argument. “I’m clearing this fall.”
He set to work. It was back-breaking, futile labor. The rocks were massive, interlocked. He could move the smaller ones, but the key stones, the ones holding the entire mass in place, were beyond even his strength without tools. After an hour, his hands were raw, his uniform soaked with sweat and dust. He’d made a dent, maybe three feet deep, into a pile that was twenty feet thick. The ceiling above the debris groaned ominously with every shift.
“Stop.” Her voice came through a small gap he’d made. “You’re going to trigger another collapse. On both of us.”
He drove his fist into the rock, pain shooting up his wrist. He leaned his forehead against the cold stone, breathing hard. She was right.
“The fissure is the only variable,” she said, her voice closer now, just on the other side of the rock. “You have to scout it. If it leads out, you can get help. If it doesn’t… we need to know what we’re working with.”
We. She kept saying we. As if they were a unit. As if their fates weren’t now separated by a wall of stone and a brutal calculus of resources.
“You have the food,” he stated, the unspoken implication hanging in the stagnant air.
“I have the food,” she echoed. Then, quieter. “And you have the only guaranteed way to possibly find a way out. That’s the distribution. It’s logical.”
It was. That was what infuriated him. She was being coldly, clinically logical, and it mirrored his own thoughts so exactly it felt like an invasion. He was used to being the only one who made the hard calls.
“I’ll scout the fissure. Half the canteen stays with you.” He unclipped it.
“No. You’ll need it for the climb. The air is dry. You’ll dehydrate faster. I have the lake water. I can boil it with the lantern flame if I’m careful.”
“The lake water could be mineralized. Toxic.”
“And dehydration is definitely fatal. Take the water, Levi.”
He stood there in the dark, clutching the canteen. He couldn’t see her. Just the faint glow of her lantern light seeping through the cracks. He heard the rustle of fabric, then a small, wrapped bundle was pushed through a narrow gap at the bottom of the debris pile.
“Take these too. Half the ration bars.”
He crouched, pulling the bundle through. Four dense, oat-and-honey bars. It was an even split. A partnership. He shoved them into his pocket.
“I’ll be back in six hours,” he said. “Maintain silence. Conserve the lantern fuel. If you hear anything from the fissure that isn’t me, block this gap.”
“Understood.” A pause. “Captain.”
He didn’t reply. He turned, faced the dark slash in the rock, and entered.
The fissure was a claustrophobic’s nightmare. It twisted, narrowed, widened unpredictably. He had to shimmy, climb, and crawl. The warmth was more pronounced, the dry dust coating his throat. He marked his path with small cairns of loose stone. After two hours of arduous progress, the fissure opened into another, smaller cavern. This one was bone-dry, scattered with strange, pale fungal growths. And there, on the far side, was a sight that sent a jolt through him: a sloping shaft, partially collapsed, but with a distinct, steady draft of cold, fresh air flowing down it. Not the smell of the deep earth. The smell of the surface. Of snow and pine.
It was a way out. Possibly.
He estimated the climb. Another three, four hours to clear enough debris to ascend? Maybe less. Then a return to Amiya, a slow excavation from both sides with the knowledge of an escape route… it was a plan. A fragile one, but a plan.
He turned and began the arduous journey back, his mind already mapping the logistics. He reached the main cavern fissure entrance after another two hours of brutal effort. His body ached, his mouth was parched despite the water he’d sipped. He called out as he approached. “Ito. I’m back. Found a potential exit. Needs work.”
Silence.
“Amiya.”
He quickened his pace, emerging from the fissure into the dim light of the cavern. Her lantern was still on, but turned low. She was sitting with her back against the rockfall, her head bowed. She didn’t move.
A cold that had nothing to do with the cavern seeped into his veins. He was across the space in seconds, kneeling before her. “Hey.”
Her head lifted slowly. Her face was pale, beaded with a cold sweat that wasn’t from exertion. Her green eyes were glassy, unfocused. “Took you… a while,” she slurred.
His gaze dropped. Her left hand was pressed against her right side, just above her hip. The fabric of her uniform was dark, wet. Not with water. The color was wrong.
“Where,” he demanded, his voice a whip-crack.
“When it fell… a rock. Sharp. Didn’t think it was deep.” She tried to shrug, winced violently. “Must have… reopened things. Slower this time.”
He didn’t ask. He pushed her hand away. The tear in her uniform was modest, but the stain beneath was not. He didn’t bother with gentleness, slicing the fabric away with his knife. The old scar from the cable was an angry pink line. A few inches above it, a new, deeper gash seeped blood steadily. It wasn’t a gushing arterial wound, but it was a seepage that hadn’t clotted. She’d been bleeding, slowly, silently, for hours while he was gone.
The calculus shifted. Instantly, irrevocably.
The exit shaft was a maybe, a hours-long climb away. Her blood was a fact, pooling in the dust beside her.
He ripped a strip from his own shirt, folded it, and pressed it hard against the wound. She hissed, her back arching. “Stop moving.” He used longer strips to bind it tightly around her torso, the pressure firm and unyielding. “You should have told me.”
“You had the objective,” she whispered, her head lolling back against the rock. “The variable.”
“You’re the variable that’s currently leaking all over the goddamn floor,” he snapped. He checked her pack. The half-canteen was still there. He forced a sip into her mouth. “How much fuel in the lantern?”
“Not… not much. Few hours.”
He looked at the rockfall. At the fissure. At her pale, sweating face. The plan was ashes. He couldn’t leave her to dig for days. He couldn’t take her up the fissure in this condition; the climb would kill her. Waiting for a rescue that would never come in time was suicide.
There was only one other variable.
He stood and walked to the edge of the still, black lake. The ‘Lake of Reflection.’ He picked up a stone and threw it in. The plunk was hollow, deep. He stared into the inky water.
“What are you doing?” Amiya’s voice was thin.
He didn’t answer. He was thinking of the map, of old stories. Of water finding the lowest path. Of lava tubes and volcanic caves. This lake wasn’t just a pool. It had to be fed. And where there was inlet water in a cave system, there was often an outlet.
“The lake,” he said, turning back to her. “It’s our way out.”
She blinked, trying to focus. “It’s a dead end. We scanned the perimeter.”
“We scanned above the water.” He walked back to her, crouching. “The exit isn’t around it. It’s under it.”
Her eyes widened, a flicker of understanding cutting through the pain. “An underwater passage.”
“It’s the only vector left.” He started gathering the few useful items: the remaining food, the canteens, the lantern. He fastened her pack securely to his own. “Can you hold your breath?”
“Levi… I can’t… I can’t swim like this.”
“You won’t have to.” His voice was calm now, the decision made, the path clear. It was insane. It was probably fatal. It was all they had. “I’ll get us through. But you have to hold your breath for as long as you can. Understand? Nod if you understand.”
She looked at him, at his gray eyes which held no doubt, only a terrifying, absolute resolve. She nodded.
He helped her stand, her arm slung over his shoulders, her weight leaning into him. He could feel the heat of the fever starting in her body, the tremor in her limbs. He led her to the water’s edge. It was black, cold, unknowable.
“Trust the vector,” he said, the words from a different lesson on a different wall.
He took the deepest breath he could, gripped her tightly around the waist, and stepped off the edge into the dark. The cold was a shock, a stunning fist that drove the air from her lungs in a burst of bubbles. He kicked, dragging them down, away from the fading lantern light, toward the deepest, blackest part of the lake floor, where the old man’s stories and the logic of water and stone said a passage must lie. The pressure built in his ears. Her grip on him was frantic, then weakening.
He swam into the blackness
The black water swallowed all light, all sound, all up and down. It was a pure, pressure-filled void. Levi kicked, one arm locked around Amiya’s ribs, the other carving through the darkness ahead. His lungs burned. Her movements had become sluggish, a faint twitching against him.
His outstretched hand brushed rough stone, then nothing. An opening. He pulled them through it, the rock scraping against his shoulder. The tunnel narrowed, a stone throat swallowing them. His vision sparked with static. He pushed forward, legs driving, the imperative a single pounding beat in his skull: forward, forward, forward.
Then, a faint, impossible diffusion of gray above. He kicked toward it, his muscles screaming. They broke the surface into blinding, gasping chaos.
They were in another cavern, smaller, lit by a shaft of natural light from a crack high above. He dragged Amiya to a shallow ledge, her body a dead weight. She wasn’t breathing. He turned her, pressed hard between her shoulder blades. Water spewed from her lips, followed by a raw, racking cough that echoed off the walls. She sucked in a shuddering breath, then another, her body convulsing with cold and shock.
“Welcome back,” he rasped, his own throat raw.
She could only cough, her fingers clawing at the wet stone. Her skin was corpse-pale, her lips tinged blue. The bandage around her torso was soaked through, a dark red bloom mixing with the lake water. The climb, the swim—it had wrecked her.
Levi moved fast. The light was a gift. He shrugged off the packs, his hands numb but precise. He built a small, pyramid of dry moss and splintered wood found piled in a corner, using his flint to spark a flame. The fire caught, hesitant, then greedy, its crackle the first friendly sound in what felt like an eternity.
“Clothes. Off. Now.” He didn’t look at her as he said it, already wrestling with his own soaked jacket.
Amiya, still shuddering, fumbled with her buttons. Her fingers were useless, thick and clumsy. Levi saw her struggling. Without a word, he batted her hands away and did it himself, his movements clinical, swift. He peeled the wet fabric from her, down to her underthings, then wrapped her in the only semi-dry thing he had: his own Survey Corps cloak from his pack. He sat her close to the fire, her back against the warm rock.
He worked on the wound next, his expression grim. The water had cleaned it, somewhat, but the edges were puckered and pale. The seepage had slowed, but the flesh around it was hot and inflamed. Infection had already set in. He rinsed it with a trickle from his canteen, applied a fresh pressure bandage from the meager kit, tighter this time.
“This is getting repetitive,” she whispered, her teeth chattering.
“You’re a slow learner,” he replied, but his tone lacked its usual edge. He handed her a ration bar. “Eat. Small bites.”
They sat in silence, the fire popping, steam rising from their piled wet clothes. The adrenaline drained away, leaving a hollow, aching fatigue. Amiya stared into the flames, her green eyes distant. “That was stupid,” she said finally. “The lake plan.”
“It worked.”
“It was still stupid. A one-in-a-million chance.”
“So is surviving outside the walls every day.” He took a bite of his own bar, chewing methodically. “We play the odds we’re given.”
She was quiet for a long time. “You could have left me. After you found the fissure exit. It was the logical play. Secure the route, then return with a team.”
Levi didn’t answer immediately. He poked the fire with a stick, sending up a swirl of sparks. “The mission was reconnaissance. A squad, in and out. Leaving a lieutenant behind complicates the report.”
A faint, almost smile touched her bluish lips. “Paperwork. Of course.”
“It’s a nightmare,” he said, deadpan.
They lapsed back into silence, but it was different now. The sheer, silent rock of the previous cavern had been oppressive. This space, with its fire and its shaft of light, felt fragile, temporary. A stolen pocket of life.
As her shivering subsided, Amiya’s gaze wandered the cavern walls. The light from above illuminated more than just rock. “Levi,” she said, her voice gaining a thread of strength. “Look.”
He followed her gaze. Etched into the smoothed wall of the cavern, worn by time but unmistakable, was a mural. It was crude, made with charcoal or some other pigment, depicting stylized human figures. They weren’t fighting Titans. They were building. One figure held something aloft—a complex, geometric shape that looked nothing like their current technology.
He stood, approaching the wall. He ran his fingers over the lines. It was old. Centuries, maybe. “This isn’t from our era.”
Amiya pushed herself up, clutching the cloak around her. She leaned in, her analytical mind overriding her pain. “They’re constructing something. And look here.” She pointed to a series of marks along the bottom. “It’s not a language I know. It’s not any Eldian script I’ve seen.”
“A dead end for a dead civilization,” Levi muttered, but he was studying it too. The geometric shape held his attention. It resonated with something deep and unsettling, a shape from a half-remembered nightmare.
“Maybe not,” Amiya said. Her eyes were bright, reflecting the fire. “The old man’s story. This tunnel… what if it wasn’t just a tunnel? What if it was a research outpost? Or a construction site? For something they needed to hide way out here, beyond where the Titans would normally roam.”
“You’re extrapolating from a children’s drawing on a wall.”
“I’m connecting data points. Abnormal Titan activity avoiding this sector. An ancient, advanced map. This.” She tapped the mural. “They were afraid of something. Or hiding something. And we just swam through their back door.”
The implications settled over them, heavier than the rock above. This wasn’t just a cave. It was a tomb, and a message. The fresh, cold air drifting down from the crack above now felt like a whisper from that forgotten past.
Levi’s eyes snapped from the mural to the shaft of light. The climb was visible now—a jagged, difficult chimney, but climbable. “Speculation is a luxury for people who aren’t bleeding out. Can you climb?”
Amiya tested her weight on her legs, her face tightening. The fever flush was high on her cheeks. “I can climb.”
“You’re a terrible liar.”
“I’m an excellent liar. You just have better data.” She met his look. “I’ll climb. Or I’ll die here. Those are the vectors. I prefer the first one.”
He gave a single, curt nod. He doused the fire, scattering the stones. They dressed in their cold, damp clothes, the misery of it a sharp counterpoint to the mystery on the walls. He helped her to the base of the chimney. It was a twenty-foot scramble up a fractured fault line.
“You first,” he said. “I’ll be behind you. If you fall, I’ll likely let you. It’ll slow me down.”
She almost laughed, a dry, cracked sound. “Understood.”
The climb was agony. Every pull sent fire across her wounded side. She focused on the next handhold, the next inch. Below, Levi moved like a shadow, his presence a silent pressure, ready to anchor her if she truly slipped. The light grew brighter, the air sweeter. With a final, grating effort, she pulled herself over the lip and into a world of blinding white.
Snow. Pine trees. The open, gray sky.
They were out. Not at the village, but in a dense, remote part of the forest, the mountainside rising steeply behind them. The crack they’d emerged from was a mere scar in the rock, nearly invisible.
Amiya collapsed onto her back in the snow, gasping, laughing weakly at the vastness of the sky. Levi stood, scanning the tree line, orienting himself. The Wall was a faint, gray smudge to the southeast. They were miles off course.
He looked down at her, sprawled in the snow, her breath pluming, a mix of triumph and utter exhaustion on her face. The bandage was visible through her torn shirt, a stark white against the green and brown.
“Don’t get comfortable,” he said, his voice cutting through the quiet forest. “Your fever’s spiking. And we’re not alone.”
He nodded toward the treeline. Distant, but unmistakable, came the slow, crushing rhythm of enormous footsteps. One set. Then another. Moving not with mindless wander, but with a dreadful, converging purpose. They had found the exit. And something else had found them.