They told me the raid was a victory before the smoke had cleared from the opium den's back room. By dawn, I was the face of federal authority on every newspaper in Manhattan. The National Miscellany ran a full-page photograph of me standing over the body of a dead woman, my face set in that expression people mistake for coldness when it is actually just the particular shade of exhaustion you reach after shooting at someone who was using a baby as a shield.

The baby survived. I washed it in the fish market's sink, salt water and river water, watching the rainbow catch the gaslight. The woman—her name was Ivorah Delamont, though it wouldn't matter much a week later when the cable networks bought her story and the newspapers decided I was either a hero or a murderer, depending on whether their editorial board believed in federal authority or civil accountability—she had a Mauser under her apron and syphilis in her veins and the look of someone who had already made her peace with dying.

I killed five people that day. Five. I told my roommate Alice that night, sitting before the washing machine while it steamed around my wrapped ear and the hot water turned my hands pink. Five people I had to kill, and now every newspaper in New York knows my face.

The hearings started three weeks later. The Bureau of Alcohol and Firearms wanted to thank me; the Justice Department wanted to use me as a scapegoat; the press wanted to eat me alive. I sat in a hearing room with marble walls and a wood table that probably cost more than my father's entire lifetime of mining wages.

They tried to pin everything on me. Agent Krendler of the Justice Department—long neck, round ears, a dirt wolf with no wolf's strength—set a trap with a recording device disguised as a water glass. He smiled the smile of a man who has never had to fire a pistol at someone protecting a child. I took the glass, drank the water, and said: "I can confirm that the defendant has a character exactly like yours, more honest and more honest still. You are a wolf in everything but the wolf's courage."

The chairmen looked at each other. The reporters wrote it down. And for one brief, glorious moment, I thought we might actually win.

But the deal was struck in the corridors afterward. The Bureau Director Tanberry wanted his deputy retirement package. Krendler offered me as currency. And just like that, my six years of service became a line item on someone's spreadsheet.

Then the letter arrived.

It came on thick cream paper, delivered by a messenger in a uniform I couldn't quite place. The seal bore a single initial: A.F. Inside, written in a hand that looked like it belonged to a different century, were words that would change everything I thought I knew about the man I had been hunting.

*Dear Miss Calloway,* it began—not *Mr.*, not *Agent*, but *Miss*, as if I were still the small-town girl who had arrived in Manhattan with nothing but a college degree and a head full of impossible dreams.

*You carry a grief you have never named. It lives in the carbon of your bones, in the iron of your blood. Your father died in a coal mine when you were nine years old. You have spent every day since trying to prove that his death meant something. But whose cause is it that you serve, Miss Calloway? Is it the federal cause, or theirs?*

The meditation technique he described was extraordinary: staring into the bottom of a black iron pot, through which the carbon from the dead father connects to the living child, creating a bridge between what was and what might have been. By the time I finished reading, the room had gone very quiet, and the steam from my tea made small patterns on the ceiling that looked, for a moment, like the stars I used to see from my father's front porch in Kansas.

I felt, for the first time in six years, completely healed.

Harlan Whitmore was waiting. A man who made his fortune in oil and energy, Whitmore owned half the politicians in Washington and a third of the police force in New York. He had tried to use Dr. Alistair Finch—a psychologist of extraordinary ability and impossible history—to serve his interests. Finch had refused. Whitmore's response was to cut off Finch's face, feed it to his dogs, and replace it with a machine that kept him breathing and speaking.

From that point on, Whitmore existed as a half-man in a dark room, reading newspapers through a screen, controlling the world from his wheelchair, his one hand moving like a pale spider across glass. The greatest enemy of a man who cannot die is a man who will not stop living.

Finch wrote from Long Island, from an estate that was supposed to be a retirement home but was actually a fortress. He described his childhood, his sister Grace, the soldiers in the war who had taken her, the mathematics of time and reversibility. He had studied every theory of time travel and memory reconstruction, convinced that if he could just solve the equations, he could make it happen—bring Grace back, make the war never happen, make his childhood whole again.

It was the most beautiful madness I had ever encountered.

When Whitmore's men came for Finch, they found only an empty house and a single note: *The truth is not a destination but a signal, and the Fitzgerald signal carries farther than any man can imagine.*

I went to Whitmore's Long Island estate on a night so foggy the ocean might as well not have been there. I was suspended from duty. I was hunted by Whitmore's lawyers. I was considered unstable by every supervisor I had ever worked for. And yet I went, because Finch had asked me to, and because for the first time in my life, I knew that the cause I was fighting for was actually mine.

The firefight lasted forty-three minutes. I was hit once by a tranquilizer dart and once by a bullet that grazed my ribs. I fired twice: once at Pazzi, the police captain who had sold Finch for an astronomical bounty, and once at a guard who was aiming at Finch's head. Pazzi fell from a second-story window—a man who had been thrown from such heights before, by the very people he had betrayed.

Finch found me lying in the rose garden, the fog rolling through the flowers like breath. He knelt beside me, his face older and more beautiful than I had imagined, and said: "You broke it. You finally broke the machine."

"What about me?" I asked, through teeth that were barely holding together.

"You," he said, "are the Fitzgerald signal. You carry the truth farther than anyone I have ever known."

Whitmore's sister Grace killed her brother two days later, in his dark room, while he lay helpless in his breathing machine. She was not mad, as the doctors had claimed. She was the only sane person in his entire corrupted family.

Finch and I left Long Island on a train that smelled of coal smoke and autumn leaves. We traveled south, through Virginia, through the Carolinas, down to the coast of Brazil where the ocean meets the sky and the stars burn so bright they look like holes in the universe.

The last letter I received from the Bureau was from Director Tanberry himself, telling me that the machine was still running, that the appointments and the memos and the quiet compromises continued as they always had, that no amount of heroism or betrayal could ever truly change a system designed to change nothing.

I did not write back. I was too busy learning the names of the southern stars, too busy watching the light in Finch's eyes when he thought no one was looking, too busy being a person who had found a cause worth dying for and a man worth living with.

The Fitzgerald signal was real. And it was carrying.