The tunnel gave a groan beneath their feet.
Eve stopped so fast Cain nearly walked into her.
Water slapped against the concrete walls, black and oily under the beam of his wrist lamp. Somewhere below them, metal screamed. The sound traveled through the flooded service shaft and climbed into her bones.
Cain caught her elbow before she lost her balance. His fingers closed around the torn fabric above her bandage.
“Don’t,” she whispered.
His hand loosened at once. “Then keep moving.”
“You always this charming when something underground wakes up?”
“Only when I’m tired.”
“You look tired all the time.”
“That’s because I’ve met people.”
A second impact struck below. The water surged around their knees, carrying scraps of insulation, rust flakes, and something pale that brushed Eve’s boot before vanishing into the dark.
She raised her pistol.
Cain’s lamp snapped toward the water. “Don’t shoot.”
“What was that?”
“Probably a rat.”
“Rats don’t have fingers.”
For half a second, neither of them moved.
Then Cain shoved his shoulder against the tunnel wall and found a narrow maintenance ledge hidden behind a curtain of hanging cables. “Up.”
Eve climbed first, biting down on the pain tearing through her side. Her injured ribs protested every breath. The ledge was barely wide enough for one boot, and the wall sweated cold water against her back. Cain followed, one hand braced above her head, his body blocking the tunnel behind them.
The darkness below rippled.
Something large passed beneath the surface.
Eve held her breath. A ridge rose under the water, long and segmented, then sank again. The lamp caught a glimpse of translucent skin and a row of milky eyes opening along its flank.
Cain’s jaw tightened.
“Still calling it a rat?” Eve breathed.
“Not anymore.”
The thing struck the ledge.
Concrete exploded where Eve had been standing. She threw herself forward. Cain grabbed the back of her coat and yanked her toward him as chunks of wall clattered into the flood. A hooked limb scraped across the ledge, its claws clicking against the concrete.
Eve fired twice.
The muzzle flash lit the tunnel in violent white. The rounds vanished into the water. The creature shrieked, a wet metallic sound that made her teeth ache.
“Save your ammunition,” Cain said.
“It was trying to eat me.”
“That doesn’t mean you have to be wasteful.”
“Next time I’ll ask it to wait while I reload.”
Cain pulled her onward. They moved along the ledge, slipping between pipes and collapsed cable trays while the thing thrashed below. Every few seconds, its body struck the tunnel wall. The impacts shook loose dust and drowned the city’s distant thunder.
At last, the ledge rose toward a steel platform. Cain hauled himself over the railing, then reached down for her.
Eve stared at his hand.
A smear of blood darkened his palm. Not hers. His knuckles had split against the railing, and the old scars across his fingers stood out white beneath the grime.
“You’re bleeding,” she said.
“I noticed.”
“You should get that looked at.”
“I’ll put it on my schedule.”
He kept his hand extended.
Eve took it.
His grip was firm, warm, and gone too quickly. He pulled her up, and for one unsteady moment her chest struck his. She felt the hard rhythm of his heart through his soaked jacket.
Then he stepped away as if the contact had burned him.
The platform ended at a circular blast door three meters high. Its surface was layered in black corrosion, but beneath the grime Eve could make out a faded symbol: a white sun split by a vertical line.
The symbol appeared on the black box whenever it projected the route.
Her stomach tightened.
Cain wiped water from the door’s control panel. Most of the keys had melted into useless lumps. One narrow slot remained, surrounded by a ring of dead blue lights.
“The Ninth Research District,” he said.
Eve looked at the door. “This is the part where you tell me you’ve opened it before.”
“I’ve stood on the other side.”
“That wasn’t my question.”
“No. I’ve never opened it.”
The black box, strapped beneath Eve’s jacket, gave a soft mechanical chirp.
Cain turned toward her. “Take it out.”
“Why?”
“Because it’s asking for you.”
“I’m not a vending machine.”
“You’re not the one making the rules.”
“That line is getting old.”
“So is being alive.”
He took the box from her only after she nodded. The device was no larger than a brick, its cracked casing glowing with thin amber veins. When Cain placed it against the dead panel, the box projected a column of symbols into the damp air.
DAWN KEY: PRESENT.
BIOLOGICAL POWER SOURCE: REQUIRED.
ORIGIN ACCESS: PENDING.
Eve’s mouth went dry. “Biological power source.”
Cain’s eyes remained on the projection. “It means your blood.”
“No. It means someone designed a door that needs a person.”
“Same result.”
“Don’t make it sound simple.”
“I’m trying to make it survivable.”
The symbols shifted. A thin line of amber light crawled from the box to the panel, then stopped at a recessed handprint beneath the slot.
Eve stared at it.
The print was small. Smaller than Cain’s. The fingers were narrow, the palm shaped almost exactly like hers.
“No,” she said.
Cain did not move. “Eve.”
“No.”
Behind them, the flooded tunnel boomed. The creature had found the platform. Water spilled over the edge, spreading across the metal grating. Far down the shaft, something struck the ladder and began climbing.
Cain looked over his shoulder. “We have maybe thirty seconds.”
“You knew this was waiting.”
“I knew the district was sealed.”
“You knew there was something inside.”
“I knew the city sealed it for a reason.”
“You knew the door would need me.”
His silence answered before he did.
Eve stepped back. Her boot slipped on the wet grating, and pain flashed through her ribs. She caught herself against the wall, pistol still locked in her fist.
“You knew,” she said again.
“I suspected.”
“You brought me here anyway.”
“I brought you here because the people hunting you will tear the city apart to get that box. Whatever is inside this district may be the only thing that explains why.”
“And if the explanation kills me?”
Cain’s gaze dropped to the blood seeping through her bandage. When he looked up, the cold officer’s mask had cracked. Beneath it was exhaustion. Guilt. Something dangerously close to fear.
“Then I’ll make sure it doesn’t get the chance.”
The creature’s claws hooked over the platform edge.
Cain drew his pistol and fired into the darkness. The shot thundered through the shaft. A howl answered him.
“Your hand,” he said.
Eve’s fingers tightened around her weapon. “You expect me to trust you?”
“No.”
“Good.”
“I expect you to choose between a door and whatever’s climbing up here.”
The black box pulsed against the panel.
DAWN KEY: CONSENT REQUIRED.
Eve laughed once. It came out thin and sharp. “At least it asks.”
Cain moved between her and the tunnel. “Eve.”
“Don’t say my name like you own it.”
“I don’t.”
“Then move.”
He did.
Eve pressed her palm to the recessed print.
The door inhaled.
That was the only way she could describe it. The entire blast door drew in a breath through hidden vents, pulling the damp air from the platform. Every loose wire rose and trembled. The water around her boots streamed toward the panel.
A needle emerged from the handprint and pierced her skin.
Eve screamed.
Light erupted beneath her palm. It raced up her arm in branching amber lines, hot as live current. Her vision fractured. The platform vanished.
She was standing in a white room.
Not standing. Smaller. Her feet did not touch the floor.
Glass surrounded her on all sides. Beyond it, people in gray research coats watched through masks. Their voices came muffled through speakers.
“Subject D-K remains stable.”
“Neural response?”
“Within acceptable parameters.”
A woman leaned close to the glass. She had silver hair pulled tight against her skull and a crescent-shaped scar beneath one eye.
“Evelyn,” the woman said. “Can you hear me?”
The child inside the glass lifted her head.
Eve knew that face.
Her own face. Younger, rounder, stripped of every scar except the one beneath her collarbone.
“I hear you,” the child said.
The memory changed.
A metal table. Restraints around small wrists. A crown of needles descending toward her skull.
“Tell us what you see.”
“Light.”
“What color?”
“Hungry.”
Another shift.
A corridor filling with red emergency light. Men in armored uniforms dragging a body across the floor. A door marked NINTH RESEARCH DISTRICT. A younger Cain Rook stood beside it, his face clean-shaven, his uniform unburned.
He was holding a rifle.
Behind him, alarms screamed.
The silver-haired woman shouted through the intercom. “You cannot shut us in here!”
Cain looked at the door.
For one impossible instant, his younger eyes met Eve’s through the observation glass.
Then he turned the locking wheel.
The memory shattered.
Eve came back choking on air.
She was on her knees. Cain had one arm around her shoulders, keeping her from falling into the flood. The door’s control panel blazed amber beneath her hand.
She struck him in the chest.
He let her go.
“You were there,” she said.
Cain’s expression emptied. “Where?”
“You saw me.”
“Eve—”
“You saw me in that room.”
The platform shook. The creature dragged itself over the railing behind him. Its body unfolded across the metal in a slick mass of pale flesh and jointed limbs. Cain spun and fired. One shot punched through the nearest cluster of eyes. The creature reared, shrieking.
Eve lifted her pistol with a trembling hand and fired into its open throat.
The beast collapsed inches from Cain’s boots.
Black fluid sprayed across the grating.
For a breath, there was only the hiss of the rainwater and Eve’s ragged breathing.
Cain lowered his weapon.
“I didn’t know who you were,” he said.
“But you knew I was there.”
“I knew there were children in the facility.”
“Children?” Her voice broke. “You locked children inside?”
His silence became a wound between them.
“You said you were containing something,” she whispered. “You didn’t say the something was us.”
“I was nineteen.”
“That makes it better?”
“No.”
The blast door began to separate down the center. A seam of darkness appeared, wider and wider, exhaling air that smelled of hot metal, dust, and something sweetly rotten.
Inside the opening, old monitors flickered awake one by one.
Each screen showed the same image: a white-haired man in a tailored black coat, standing before a wall of rotating turbines.
Osric Vane.
Eve had seen his face on ration terminals, charity broadcasts, and emergency announcements. The smiling guardian of the city. The voice that promised order while neighborhoods drowned in darkness.
The screens turned toward her.
Every dead speaker in the tunnel crackled.
“Dawn Key,” Osric Vane said.
His voice came from inside the research district.
Cain raised his pistol toward the opening.
Osric continued, calm and almost gentle. “You took longer than projected.”
Eve’s blood ran cold.
The amber light beneath her skin brightened.
Something deep beyond the door answered with a slow, colossal heartbeat.
Once.
Twice.
The city above them flickered. Through the tunnel ceiling came the distant sound of millions of lights dying at once.
Then the darkness inside the Ninth District spoke directly into Eve’s mind.
Come home.
Osric’s voice layered over it, smiling through the static.
“Welcome back, Evelyn.”