The fog rolled off the Thames like breath from a corpse.

Sir Arthur Winslow adjusted his collar and stepped out of the magistrate's office into the November night. It was just past midnight. He had no reason to be outside—his shift ended at ten, and Mrs. Pemberton had already packed his supper and lit the fire in the grate. But he was outside, and he was walking, and he knew exactly why.

A wedding procession had passed through the gate an hour ago. Not an ordinary wedding. The bride wore black instead of white. The groom walked with his head down. And there were no carriages—only six men carrying lanterns, moving through the fog like ghosts.

Arthur had served as a magistrate for twelve years. He had seen thieves, murderers, and liars. He knew when something was wrong. And this—this was wrong.

He followed at a distance, his black greatcoat pulled tight, his walking stick in his right hand. He was a man of the Church. The Bishop of London himself had praised his "unshakeable faith" at last Easter. If there was evil moving through the East End tonight, Arthur Winslow would not stand aside.

The procession moved slowly through the narrow streets. Arthur kept to the shadows. He passed through Whitechapel, where the gas lamps flickered and died one by one. He passed through Spitalfields, where the weavers' looms had been silent for three years. He passed through areas of London he had never known existed—alleys that opened like wounds in the city's skin, streets that smelled of salt and something older, something that made his throat tighten.

The bride never moved. She stood at the center of the procession, covered by a black veil, her hands folded in front of her. Arthur could not see her face. He could not see anything but the way the lantern light caught the edges of that veil, turning it silver for a moment, then swallowing it again.

They reached the docks. The Thames was black and wide, and the fog made it look like the edge of the world. Arthur crouched behind a stack of crates and watched.

The procession stopped before a church. It was not a church he recognized—no Anglican steeple, no familiar cross. The building was small and low, constructed of dark brick that seemed to absorb the lantern light rather than reflect it. The door was open. Inside, Arthur could see flickering candles and the shadows of people standing in rows.

The bride and groom entered. The six lantern-bearers formed a semicircle outside. Arthur moved closer, his boots making no sound on the wet cobblestones. He pressed himself against the brick wall and peered through a broken window.

Inside, the ceremony was already underway. But it was not a ceremony Arthur recognized. There was no vicar. No Book of Common Prayer. The man who stood before the bride and groom wore a long dark robe, and his face was partially covered by a mask carved from some dark wood. He spoke in a language Arthur did not know—low, rhythmic, like the sound of water moving through stone.

The bride stood motionless. The groom—a thin young man with pale hands—knelt beside her. And around them, Arthur counted twelve figures standing in a circle, their faces hidden beneath hoods.

Arthur closed his eyes and whispered a prayer. The Lord is my shepherd; I shall not want. He opened his eyes and saw something that stopped his breath.

The bride's hands were not folded. They were bound. Thin black cords wrapped around her wrists, and the cords extended downward—into the floor, as if the floor itself were alive and reaching up to hold her.

Arthur pushed against the wall to steady himself. His heart was beating so loudly he was certain the man in the mask could hear it. He thought of calling for the constables. He thought of kicking open the door and pulling a pistol from his coat. But he was a magistrate of the Crown, and he knew the law. Without a warrant, without witnesses, he would be thrown out. And if there was something genuinely sinister happening here—something beyond the reach of English law—then the constables would be useless.

He would stay. He would watch. And he would let his faith do what his badge could not.

The man in the mask turned. His carved eyes seemed to look directly at the broken window. Directly at Arthur.

The magistrate froze.

The man smiled. Or something like a smile moved across the wooden surface. Then he raised his hands, and the candles in the room flared—once, twice—then burned with a steady blue flame.

Arthur understood then that he was not here by accident. He had been expected. He had been invited.

The prayer on his lips turned to ash.

The man in the mask spoke again, and this time Arthur understood every word. He spoke in English, though his voice carried the accent of places Arthur could not name.

"You are Sir Arthur Winslow," he said. "Magistrate of the East End. Man of unshakeable faith."

Arthur said nothing. His hand was on his walking stick, and beneath it, his pistol.

"The Hart family has carried a burden for three generations," the man continued. "A curse. A debt unpaid. Your faith can settle it."

"I know nothing of curses," Arthur said. His voice surprised him. It was steady. "I know only the law of this land, and what I see here violates it."

"The law of this land cannot help you, Arthur Winslow. Not tonight. Not with this."

The man in the mask raised both hands. The candles burned blue. The bride—Evelyn Hart, Arthur now knew her name—lifted her head. Her face was pale. Too pale. The color of wax. The color of something that had been preserved.

Arthur felt a coldness enter his body that had nothing to do with the November night. It started at his feet and moved upward, slow and certain, like floodwater rising through a cellar.

"You are here to give your faith," the man said. "It is the only currency this curse accepts."

Arthur thought of the Bishop's words: Your faith is a shield, Arthur. Nothing can penetrate it. He thought of the prayers he had said every morning for forty-five years. He thought of the Bible on his bedside table, its pages worn soft from handling.

He thought of Evelyn Hart's face.

It was the face of a woman who had died three years ago.

Arthur knew it with the certainty of a man who has stared into a mirror and seen his own reflection blink out of sync. This woman was not alive. She had not been alive for three years. And the man in the mask was not performing a wedding ceremony. He was performing a transfer.

His faith. His life. His soul. Moving from him into her.

Arthur drew his pistol.

The man in the mask did not move. "It is too late, Arthur Winslow. You followed them. You entered the boundary. You accepted the invitation with your presence. The contract is sealed."

Arthur's finger tightened on the trigger. He aimed at the man's chest. He pulled.

The pistol did not fire. He pulled again. Nothing. He shook it—a loaded weapon, chambered with two rounds, loaded that morning as he did every day for twelve years. It would not fire.

The coldness reached his chest. He could not breathe. He could not move. He could only watch as the man in the mask turned to Evelyn Hart and placed his hands on her forehead.

The bride's eyes opened. They were not the eyes of the living. They were dark and depthless, like wells that had been dug through bedrock and found nothing but water and time.

She looked at Arthur. And she spoke. Her voice was not hers. It came from somewhere beneath her, from somewhere the man in the mask had opened and could not close.

"Thank you for coming, Sir Arthur," she said. "We have been waiting for someone with your particular... quality. Your faith is very strong. It will serve us well."

Arthur tried to speak. He tried to pray. But the coldness had reached his throat, and his voice was gone.

The man in the mask stepped forward and placed his wooden hand on Arthur's chest. Right over his heart.

The last thing Arthur Winslow felt was warmth. Not the warmth of life, but the warmth of something being taken. His faith, his certainty, his forty-five years of unshakeable belief—flowing out of him like water from a broken vessel.

The last thing he saw was Evelyn Hart's face, changing. The waxen pallor giving way to color. The stillness giving way to breath. The dead woman becoming alive.

And the last thing he felt was his own hand—his right hand, the one that had held his pistol—beginning to change. His fingers were growing dark at the tips. Not dirt. Not shadow. Something worse. A mark. Spreading. Like ink dropped in water.

The church door opened. The six lantern-bearers stepped back into the fog. The procession would return now. The bride would go home. The groom would disappear.

And Sir Arthur Winslow would stand in the broken window, frozen, as the witching hour passed and dawn approached, watching his hands turn to stone.