The vial in Elias’s hand was cold, colder than the mud he had mixed with ash to make the decoy. He checked the seal, a strip of wax the color of dried blood, and felt the liquid slosh against the glass. It was a small thing, no larger than a thimble, but it held the weight of his mother’s wasting flesh. Outside the window, the fog of Oakhaven pressed against the glass like a living thing, smelling of wet wool and rotting turnips. Elias was thirty-two, a sergeant in the city watch, and his hands shook so badly he could barely hold the glass. He had forgotten his surname three days ago. He remembered his first name, Elias, and he remembered that he had a mother, but the space where his family name used to be was now a gray void, like a hole punched in a ledger.

He needed to see Corporal Higgs. The old man lived in a garret above a chandler’s shop, where the air smelled of tallow and despair. Elias climbed the stairs, his boots squeaking on the wood. Higgs was sitting by the fire, mending a pair of socks with a needle that looked too thick for the work. He did not look up when Elias entered.

"You have it," Higgs said. His voice was dry, like leaves scraping across stone.

"I have it," Elias replied. "I need to know if it works. Truly works."

Higgs stopped stitching. He looked at the vial, then at Elias’s shaking hands. "It works," he said. "But it costs."

"Costs what? Money? I can pay. I have six weeks’ wages saved."

"Not money, boy. Memories. Every drop you give her takes a piece of you. A face. A date. A feeling. It feeds on the mind to sustain the body. It is a trade, Elias. A bad one."

Elias gripped the vial tighter. "My mother is dying. The physicians say she has a month. Maybe two. This is the only thing that can stop it."

Higgs shook his head. "Lord Vane hoards the clean water, yes. But this Rootwater is worse. It is not a cure. It is a trap. It converts your life force into the city’s sustenance. You save her body, you feed the hunger that is eating this city. You are not saving her, Elias. You are sacrificing yourself to keep her breathing."

Elias felt a cold knot form in his stomach. "You are lying. You want the vial for yourself."

"I am old. I have nothing left to lose. I am telling you the truth because I loved your father, and I loved you. But you are stubborn. You will go to Vane. You will try to trick him."

"I will do what I must," Elias said, standing up. "I will not watch her die."

He left the garret, the smell of tallow clinging to his coat. He walked through the streets of Oakhaven, where the shadows seemed to stretch and twist in the fog. He passed a market where a woman was selling apples that looked like bruises. A dog with matted fur watched him from a doorway, its ribs showing through its skin. Elias felt the first memory slip away. He tried to recall the color of his childhood bedroom door, but the image was gone, replaced by a blank white space.

He arrived at Lord Vane’s manor. The house was large and rotting, its windows dark and jagged. The air inside smelled of stale wine and decay. Vane was waiting in the hall, sitting in a chair that looked like it was made of bone. He was a thin man, with a face that was slowly melting into his collar.

"Sergeant Thorne," Vane said. His voice was smooth, like oil. "You have something of mine. The Rootwater."

"I have a tonic for my mother," Elias said. "I want a physician. A good one. Not the charlatans you send."

Vane smiled. It was a cold smile, with no warmth in it. "A fair trade. Give me the vial, and I will send my best doctor to your tenement. She will be cured. Or as close to cured as this city allows."

Elias nodded. He reached into his pocket and pulled out the vial. But instead of the glass with the liquid, he placed the decoy on the table. It was made of mud and ash, sealed with wax that looked identical to the real one.

"Take it," Elias said.

Vane picked up the decoy. He held it up to the light, his eyes glowing with a faint, unnatural yellow. He sniffed it. Then he placed it back on the table.

"You think you can fool me, Sergeant? I can smell the lie. This is dirt."

Elias’s heart hammered against his ribs. "It is the tonic. I made it myself."

Vane stood up. He was taller than Elias, and he loomed over him. "You are clever, Elias. But you are also foolish. You have already paid the price. The first drop you held, the first memory you lost. I felt it. The city felt it. You have fed the hunger, even if you did not drink."

Elias looked at the decoy. It was still there, solid and real. But he knew Vane was right. He could not remember his mother’s face. He could see her in his mind, a blur of gray and white, but the details were gone. Her smile. The lines around her mouth. They were erased.

"Give me the real vial," Vane said. "Or I will take it from you. And I will take more."

Elias backed away. "I have no vial. I only had this."

Vane laughed. It was a dry, cracking sound. "We will see. Go. Take your physician. But know that the city is watching. And the city is hungry."

Elias left the manor. He walked back to the tenement, his legs heavy. The fog was thicker now, and it smelled of iron. He climbed the stairs to his mother’s room. She was sitting in a chair by the window, her skin pale and thin.

"Elias," she said. Her voice was clear, strong. "You are here."

"I am here, Mother."

"Who is that?" she asked, pointing at the door.

"Who?"

"The man in the mirror. He looks like my husband. But he is not him."

Elias looked at the mirror. There was no one there. Only his own reflection, pale and terrified.

"Mother, do not listen to shadows," he said. "I am here. I am Elias."

She looked at him. Her eyes were bright, but they did not know him. "You have your father’s voice," she said. "But you are not him. You are a stranger."

Elias felt the walls of the room shift. The plaster was blackening, oozing a thick, dark sap. It smelled of blood and rot. He realized then that the Rootwater was not in the vial. It was in the city. It was in the air, in the walls, in the blood of the people. He had not been holding the tonic. He had been holding the key to the lock.

He reached into his boot. There, hidden beneath his sock, was the real vial. He had not given it to Vane. He had kept it. He had been so afraid of losing it that he had forgotten he still had it.

He uncorked the vial. The liquid inside was black and swirling. He drank it.

It tasted like ash and lightning.

The memories came back, not as images, but as pain. He screamed. He felt his childhood home rise up in his mind, the smell of his mother’s baking, the sound of his father’s laugh. He felt the weight of his uniform, the cold of the watch, the fear of his mother’s death. It all came back, sharp and violent.

He saw Vane. He saw the man dissolving into the sap, his face melting away. He saw the city, a vast, hungry mouth, waiting to swallow him.

He stood up. He walked to the door. He opened it.

The hallway was dark, but he could see the light at the end. It was the light of the city’s center, where the fountain of clean water stood.

He walked toward it. His mind was a void, but his body was strong. He was a weapon now. A weapon made of memory and rage.

He reached the fountain. The water was black. He looked at the statue of Lord Vane, carved in stone. The face was melting.

Elias opened his mouth. He did not speak. He screamed.

The sound was a physical force. It cracked the windows of the surrounding buildings. It shattered the mirrors in the houses. It broke the stone face of the statue.

The black sap on the walls receded. The fog lifted. The smell of rot was replaced by the smell of fresh rain.

Elias stood in the center of the square. His body was intact, but his mind was a void. He looked at his hands. They were not shaking.

He looked at the fountain. The water was clear. He remembered his name. Elias.

Just Elias.