I

The woman who hired me was dressed in black, which in 1947 Chicago meant one of two things: she was either a widow or she was putting on an act. From the way she carried herself, I suspected the latter. She was too young to be properly mournful and too rich to be genuinely distressed.

Her name was Dorothy Wayne, and she sat across from me in my office on South State Street with her hands folded in her lap and a expression on her face that suggested she was accustomed to getting what she wanted and did not see why this particular request should be any different.

"I need you to find a man," she said. "Dr. Alvin Krause. He's missing, and my employer would like to know where he is."

"Everyone's missing someone," I said. "What makes this one special?"

She looked at me for a long moment, assessing me the way a judge assesses a defendant who has already been found guilty but is being given the formality of a sentence. "Because Dr. Krause is not just any man, Mr. Keller. He is a man who knows things that very powerful people would like to keep knowing."

I lit a cigarette and blew the smoke toward the ceiling. "And you're the messenger."

"I am the messenger," she said. "And your fee is fifty dollars a week, plus expenses. You will report to me directly. You will not contact the police. You will not contact any media. You will find Dr. Krause and you will tell me where he is, and then you will do exactly what I tell you to do with that information."

I took the job because fifty dollars a week was more money than I had seen in three months, and because the alternative was sitting in this office waiting for the phone to stop ringing, which it would eventually do, and then what would I do?

II

Dr. Krause's laboratory was on the south side of Chicago, near the stockyards. It was a legitimate operation on paper—a medical research facility funded by a foundation that sounded respectable until you looked at who funded the foundation. The lab was clean, well-equipped, and completely empty when I arrived, as if everyone had been evacuated in a hurry.

Except no one had evacuated. There were no signs of a hasty departure—notebooks on desks, coffee cups on shelves, a half-eaten sandwich on the windowsill. The lab had simply been shut down, the equipment inventoried and packed away, and the building sealed.

In the refrigerator, I found something that was not supposed to be in a refrigerator. A row of glass jars, each labeled with a number and a date, each containing a piece of tissue suspended in a clear liquid. The tissue was pink and fibrous, and it looked exactly like what it was: brain tissue. Human brain tissue, kept alive in a nutrient solution that I had no way of identifying but that, from the way the tissue moved faintly when I tilted the jar, was clearly working.

I took a photograph of the jars with the camera I kept in my coat pocket—a Brownie Hawkeye that had seen better days—and then I left.

The first lead took me to a dockworker named Tommy Rafferty, who knew everyone who moved product through the Port of Chicago and had heard about Dr. Krause from a man who knew a man who worked at the lab.

"Krause was a Nazi," Rafferty said, which was the kind of information that was either useful or completely useless depending on the context. In my experience, it was usually both. "He came over through Backchain or whatever they called that program. Worked for the government for a while and then left. Started his own lab. Made friends with the wrong people."

"Which people?"

Rafferty looked around the bar to make sure nobody was listening and leaned closer. "Logan Black. He's a union man on the docks, but he's more than that. He's the guy who decides which trucks get unloaded and which ones sit at the gate until the perishable stuff goes bad. And Krause was doing something for him. Something medical."

"What kind of medical?"

Rafferty shook his head. "I don't know. But Krause's lab had a special refrigerator. And Black's got a private room at a hospital uptown that nobody's allowed near without an invitation."

III

The hospital was a private facility on North Michigan Avenue that catered to people who could afford to disappear in plain sight. I did not get an invitation, but I did get a view of the building from a taxicab, and I watched for three hours as people entered and exited through the side door.

Dorothy Wayne came out at four o'clock. She carried a small leather bag and walked to a black Packard that was waiting at the curb. The driver opened the door, she got in, and we drove.

I followed at a respectful distance, which in Chicago traffic meant I was roughly thirty seconds behind her and approximately two blocks away, which is the standard distance for a detective who does not want to be noticed.

The Packard stopped at a warehouse near the river, and Dorothy went inside. I parked two blocks away and walked the rest of the way, cutting through an alley that smelled of old meat and newer garbage, and arrived at the warehouse at approximately the same time she did.

The warehouse was not what I expected. It was not a warehouse at all—it was a converted factory, and the ground floor had been converted into something that looked like a laboratory crossed with a hotel room. There were medical equipment and glass jars on one side and a bed and a desk and a small kitchen on the other.

Logan Black was sitting in a chair by the window, reading a newspaper. He was a large man, the kind of large that comes from eating well and exercising power rather than physical labor. He looked up when I entered and did not seem surprised to see me.

"Mr. Keller," he said. "I wondered when you'd show up."

"Word gets around," I said.

"Word gets around very quickly in this city," he said. "Sit down. You're going to want to hear this."

I sat. He told me about Dr. Krause and what he had been working on, and what it was, in the simplest terms I had heard all week:

"He's figured out how to keep people alive. Not cure disease or extend life by a few years. Keep them alive. The brain tissue in his lab isn't for research. It's for replacement."

IV

Dr. Krause had found a way to preserve human brain tissue in a state of suspended animation—alive, aware, and capable of retaining memory and personality for extended periods. The implications were staggeringly obvious to people who had money and power and a fear of death: if you could keep a piece of your brain alive while your body failed, you could eventually transplant it into a new body. You could, in effect, copy your personality.

Black was not interested in immortality for its own sake. He was interested in it as a tool. A witness who could not die. A rival whose memories could be extracted and examined. An agent who could be rebuilt if the original was compromised.

"And you're his backup," I said.

"I'm his template," Black corrected. "He's been growing my tissue for three years. Building a copy. When the time is right, I won't need to die. I'll just... move."

He looked at me with eyes that were perfectly calm and entirely empty of empathy. "You're going to help me finish the process, Mr. Keller."

I thought about Dorothy, standing in this room with her leather bag and her black dress, a woman who worked for a man who had solved death and decided that the solution was also a weapon. I thought about the jars in the refrigerator, each one containing a piece of someone's mind, preserved like specimens in a bottle.

I stood up. "I'm a detective," I said. "I find things. I don't help with them."

Black smiled. It was not a kind smile. "You're a detective who hasn't worked in three months. Who has a brother who committed suicide three years ago and whom you never stopped wondering about. Who has a file in our basement that contains the truth about what really happened to him."

I froze. The cigarette in my hand had burned down to the filter, and I had not noticed.

"Your brother was one of our early subjects," Black said. "He didn't commit suicide, Mr. Keller. He was the first person we tried the process on. And it didn't work. His tissue degraded within forty-eight hours. But we kept the samples. And sometimes, when I want to remind myself how fragile these things are, I look at them."

I walked out of the warehouse and into the Chicago night, and I did not know whether to go to the basement or stay away, whether to look at what they had done to his brother or pretend he had always been dead, whether to fight a man who had already cheated death or let him win and walk away.

The rain started as I reached the street, and it fell on Chicago the way it always fell on Chicago: without pity, without mercy, washing the streets clean of whatever had spilled on them and leaving everything exactly as it had been before.

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