Three days later, Shen woke with no pain.
His arm was healed. The crack in the bone was gone. He flexed his fingers. No ache. His ribs felt solid. He touched his forehead. The cut had closed. Only a thin scar remained.
The triangle mark on his palm was dark. Warm. He got up. Dressed. Took his hook.
He stood by the window for a moment. The street was empty. Dust blew across the cracked pavement. Somewhere in the distance, a piece of metal banged against a wall. The wind was picking up.
He walked out.
The central ruin was quiet. Most survivors stayed inside until midday. Too many things came out at night. Shen walked fast. His boots crunched on broken glass.
He knocked on Jiang's bunker door. Three times. Pause. Two times.
The door opened. Jiang stood there in a clean shirt. Her arm was bare. No bandages. The cut was gone. Only a thin red line remained.
"You healed fast," he said.
"So did you." She looked at his forehead. The scar was already white. "Your body works fast."
"The mark helps."
She grabbed her dagger from the hook on the wall. The blade caught the light. She tucked it into her belt. Then she picked up the compass. The needle spun for a moment, then pointed east.
"Ready?" she asked.
He nodded.
They left.
The east dock was an old concrete platform. Half of it had fallen into the black water. The rest stood on rusted pillars. The river lapped against the broken edge. The water was dark. Thick. It smelled of rot and old chemicals.
Storage units lined the back wall. Numbered. Rusted. Some had doors missing. Inside the open ones, you could see old crates, broken furniture, and a child's bicycle. All abandoned. All forgotten.
Unit 47 was near the end. The lock was old but intact. A layer of dust covered it. No one had been here in years.
Shen took out the key. Brass. Number 47 is engraved on the side. He put it in. Turned.
The lock clicked. The door swung open with a low groan.
Inside was a small metal box. No rust. Clean. It sat alone on the concrete floor. Someone had placed it here recently. The dust had been wiped away.
Shen knelt. Pulled it out. Set it on the ground.
He opened the lid.
A puff of black smoke shot out. Shen jumped back. Jiang raised her dagger.
The smoke twisted in the air. Then it formed a shape. A figure. Gray. Translucent. A ghost. It had no face. Just a human shape made of mist. It floated a few feet off the ground.
It lunged.
Shen swung his hook. The hook passed through the ghost like smoke. No effect. The ghost hit his chest. Cold shot through him. He stumbled back. His breath fogged in front of his face.
"It's not solid!" Jiang shouted.
She stabbed with her dagger. The blade passed through. Nothing. The ghost turned. Swiped at Jiang. She dodged. The ghost's hand passed through her shoulder. She shivered. Her teeth chattered.
Shen looked at his palm. The triangle mark was glowing. He raised his hand. The ghost stopped. It looked at the mark. Then it looked at Shen.
It backed away. Then it faded. Dissolved into the air. Gone.
Jiang lowered her dagger. She rubbed her shoulder. "What was that?"
"A trap," Shen said. "My father left it."
He knelt. Inside the metal box were two items. A notebook. Old. The leather cover is cracked. The pages were yellow. And a black stone. Smooth. Cold. It didn't glow. It didn't feel special. Just a rock. About the size of his fist.
Shen picked up the notebook. Flipped it open. The handwriting was his father's. Messy. Rushed. Some pages had water stains. Others had burn marks.
He read a few pages in silence. Then he looked at Jiang.
"There's a lot here. About the doors. About my mother."
"What about the stone?" Jiang asked.
"I don't know. Looks like a rock."
He put the notebook and the stone in his pocket. The weight pulled at his coat.
"What now?" Jiang asked.
"We go back."
They stood up and left the dock.
The sun was higher now. The air was warm. They walked back through the empty streets. Past broken walls. Past rusted cars. Past a collapsed shop where a family had once lived. Now only rats lived there.
Halfway home, a girl stepped out from behind a collapsed shop. Wang Mei. She looked thinner than before. Dark circles under her eyes. Her clothes were dirty. Her hair was tangled.
"Finally found you," she said.
Shen put his hand on his hook. "How?"
"I've been looking all morning." Her voice was hoarse. "Old Chen said you might come this way. I waited."
She stepped closer. "Someone came to my stall a few days ago. He wanted my father's coin. Said it was a pass. A way into the doors. He tried to force me to sell it."
"Did you?"
"No. He left. But he'll come back." She looked down at her hands. "I don't know what to do."
She looked at Shen. "I need to know. How did my father really die?"
Shen was quiet for a moment. He thought about how to say it. Then he spoke.
"We met him at the door. We fought together. He got poisoned. There was no cure. He held off the monster so we could escape. Then he died. Before he died, he told us to give you the coin."
Wang Mei's eyes were wet. But she didn't cry. She blinked. Swallowed. Her throat moved.
"Thank you," she said. "I understand."
She turned and walked away. Her steps were slow. Her shoulders were heavy. She disappeared between the broken buildings. The wind blew dust across the spot where she had stood.
Shen and Jiang continued walking.
The wind stopped. The air grew cold. A shadow stretched across the ground in front of them, even though there was no sun.
A man stepped out from behind a broken wall. He wore a long coat. Hood up. His face was in shadow. But his hand was visible. On his palm, a mark. Different from Shen's. A circle with a line through it.
He didn't speak. He just stood there. Watching.
Shen put his hand on his hook. Jiang moved her hand to her dagger.
The man raised his palm. The mark glowed faintly. Shen's triangle mark pulsed in response. Hot. Then cold. Then hot again. The sensation spread up his arm.
The man's hood turned slightly, as if he was looking at Shen's hand. Then he lowered his arm. A thin smile appeared under the hood.
He turned and walked away. His footsteps made no sound. He moved like smoke.
Before he disappeared into the ruins, he said, "In the second door, you'll meet someone you know."
He was gone.
"Wait," Shen said. But there was no one there. Only the broken wall and the empty street.
On the ground where the man had stood, there was a small photograph. Old. Worn. The edges were curled.
Shen picked it up.
It was his father, younger, standing next to the same man. The hood was down in the photo. The man had a sharp face. Cold eyes. His father had his arm around the man's shoulder. They were both smiling.
On the back of the photo, a date was written: "Three years before the Great Drowning." And a location: "East dock. Unit 47."
Shen stared at the photo. His jaw tightened. His father had known this man. They had been friends. Or partners. Or something else.
Jiang looked over his shoulder. "That's the same storage unit we just opened."
Shen turned the photo over again. The man's cold eyes stared back at him.
"He knew we'd be there," Shen said. "He left this for us."
He put the photo in his pocket next to the notebook. His hand was shaking. Not from fear. From something else. Anger. Or confusion. Or both.
They stood in silence. The wind picked up again. The cold was gone. The sun felt warm on their faces.
They walked the rest of the way without speaking.
At the central ruin, Jiang stopped.
"We need to read that notebook properly," she said. "And find out who that man was."
"Tomorrow," Shen said. "I need to rest."
She nodded. "Tomorrow."
She went into her bunker. The door closed behind her.
Shen walked home.
He reached his door. Checked the frame. A small triangle carved into the wood. New. He rubbed it off with his thumb. The mark left a dark smudge.
Inside, he sat on his bed. The room was cold. Quiet. Dust motes floated in the light from the window.
He took out the notebook and the stone.
The stone was still cold. He turned it over in his hands. Nothing. Just a rock. He put it on the shelf.
He opened the notebook. Read the first page again.
"Your mother is there. I will go to her."
He flipped through more pages. Notes about the doors. Diagrams. Names. Dates. Some pages were torn out. Others were smeared with what looked like blood.
He closed the book. Put it under his mattress.
Then he took out the photograph. He looked at it for a long time. His father's face. The other man's cold eyes.
He put the photo under the mattress too.
His palm was warm. The triangle mark pulsed. Slow. Steady.
He lay down. Stared at the ceiling. The wood was cracked. A spider crawled across a beam.
Three days ago he had found a key. Today he had opened a box. Met a ghost. Talked to Wang Mei. Found a photograph.
And the second door was still coming.
He closed his eyes.