The scream didn't echo.
It was swallowed whole by the rock.For several long, suffocating seconds, nobody moved. Hayama stood rigid at the edge where the stone steps had dissolved, his service pistol drawn and locked toward the empty flags. Behind him, Mina's field slate cast a sickly blue glow over the cavern floor. In Daichi's grip, Mochi had stopped thrashing, his tiny pink nose pointing dead into the gloom.
"You heard that," Mina whispered, her voice barely carrying past her collar.Hayama didn't look back. "I heard it.""That was a person, Kaito," Daichi said, his voice dropping low. "A human voice. We can't just leave them down here.""We don't know what's under those flags," Hayama muttered, keeping his sights level with the dark.
"We heard someone screaming!"
"We heard something die," Hayama snapped, his tone flat and cold. "Our orders are reconnaissance on the third tier. We do not drop into an unmapped spatial fracture because an unauthorized party got themselves cornered.
We're pulling back."Daichi took half a step forward, his jaw tightening, but Hayama cut him off with a look that brooked no argument.
Before anyone could take another breath, the rock vibrated beneath their boots.
A dull, wet thud. Then another.Something was dragging itself up through the solid floor.
"Doctor..." Mina breathed, her hand trembling against her holster."Quiet," Hayama ordered.
A small piece of limestone skittered across the flags, rolling out of the pitch-black space near the wall. Then a second pebble followed. Then a third.Something had kicked them.Hayama took two slow steps back, keeping his boots light against the stone. "Fall back. Now."
They turned to retreat when another shriek tore through the vault.It was deafening. A ragged, desperate howl of pure agony that climbed in pitch until it cracked into a wet gurgle, snapping shut like a broken hinge.Then came the heavy roll of meat against stone.
*Thump. Roll. Scrape.*
An object tumbled out of the darkness, bounced across the uneven floor, and bumped softly against the steel toe of Mina's field boot.Mina looked down.
Her scream tore through the cavern.
It was a severed human head.
Blood pooled rapidly around the jaw, dark and thick against the white flagstones. The face was young, pale, its wide, unblinking eyes locked in a permanent grimace of terror.
Mochi shrieked, clawing frantically at Daichi's chest rig.Hayama grabbed Mina's shoulder harness and yanked her backward before she could collapse. "Don't look at it! Move!"
From the dark hole where the floor had sealed, a low, rumbling growl resonated through the limestone. The air turned foul—thick with the stink of rotting marrow, bile, and stagnant water.Mina's handheld slate began screeching a shrill alarm. "Miasma levels... they just blew past the maximum threshold!"
Far down in the black, two crimson points of light ignited.They didn't blink. They weren't torches.
Eyes.
The twin burning embers rose smoothly, climbing through the empty dark toward the cavern ceiling."Get to the passage!" Hayama yelled, raising his sidearm.
*THOOM.*A massive, heavy impact shook the cave walls, showering their shoulders in stone dust.The red eyes flared. For one terrifying second, the glow caught the edges of a hulking silhouette—an impossible mass of segmented armor, jagged limbs, and heavy claws digging directly into the solid rock. And behind that nightmare, etched faintly into the haze, hung the colossal, unblinking outline of a second eye.
"RUN!"They bolted.
A concussive shockwave ripped through the chamber behind them, hurling loose gravel and fractured masonry into their backs. Mina stumbled, her knees hitting the stone, but Daichi hauled her up by her webbing. Behind them, the sound of tearing metal and crushed basalt echoed through the tunnel as they scrambled out into the cold air of Level Three.§Far beneath that chamber, three men were running for their lives.They were gasping, stumbling, their boots slipping on blood-slicked stone. Their fourth man was already gone.
They had slipped through the surface perimeter hours ago, chasing the rumors of unmapped ruins and easy salvage. Level One had been simple. Level Two had been even easier—they had killed a couple of skittish native beasts with cheap hunting rifles, laughed about it, and treated the place like an open game preserve.Then Level Three had broken them.
The armored boar had torn their point man in half before they could even empty their magazines. They had fled blindly into the ridge, thinking the limestone fissure was a defensible bunker.
It was no bunker. It was a slaughterhouse.
"Keep moving, damn you!" the leader yelled, his voice cracked with terror."Where is it?!" the youngest man wailed, tears cutting streaks through the grime on his cheeks. "I want to go back! I want to get out of here!"
"There is no back!" The leader shoved him forward. "We find the shaft or we die in the dark!"The leader glanced down at the tactical camera strapped to his chest vest. Its small green LED was still blinking, feeding encrypted telemetry over an emergency relay channel.
"If we make it out, we've got the footage," the leader muttered through clenched teeth, his hand white around his rifle grip. "And if we don't, the syndicate knows what to charge for the recovery."
A heavy scrape echoed from the ceiling above them.The men froze.The leader slowly tilted his weapon's tactical light upward.The beam didn't find rock. It found teeth.§Back at the river crossing, Hayama's squad collapsed against the perimeter sandbags.
Daichi hit the dirt on one knee, his chest heaving, his hands pressed tightly over the shivering lump of white fur inside his coat. Mina sat slumped against a steel crate, her face gray, staring blankly at the dark tree line across the water.Hayama stood by the pontoon bridge, his sidearm still drawn, watching the far bank.Nothing followed.
No heavy footsteps. No tearing claws. Only the steady, indifferent churn of the river."Miasma is receding," Mina managed, her voice shaking as she checked the slate. "It's staying on the far side."
"It killed a man," Daichi rasped, staring at his boots. "Just threw the head right at us.""And it stopped at the water," Hayama said coldly. "For now. Move back to the central camp."
When they stumbled into the corrugated main post, Professor Aizawa was already waiting by the map table. One look at their blood-spattered gear brought him to his feet.
"What happened out there?" Aizawa demanded. "Your vitals spiked through the roof.""Get the field hospital on standby," Hayama said, tossing his spent magazine onto the steel desk with a sharp clatter.
Aizawa blinked. "For who? You three aren't hit.""Not for us," Hayama replied. "We found the stairs. Something came up from the deep."Before Aizawa could speak, the tactical terminal on the wall let out a harsh burst of static.
The monitor blinked. Lines of corrupted scan lines tore across the screen, resolving for three brief seconds into a shaky, wireless feed.
A stone corridor. Fresh blood smeared across ancient murals. A man with a rifle screaming soundlessly into the dark.Then, a massive claw reached into the frame, and the screen shattered into dead static.
The staging room went dead silent.Aizawa looked from the dead screen to Hayama, his face completely drained of color. "There are poachers down here?"Hayama stared at the black monitor, his jaw locked tight.
"Not anymore," he said.