She walked into my office like trouble does in movies—late, wet, and wearing a coat that cost more than my desk. Her name was Helen Walker, and she wanted me to find her husband.

"He disappeared last Tuesday," she said, sitting without being offered a chair. Rain traced lines down the window behind her. Los Angeles looked like it was crying, which in this town was saying something.

"When did you last see him?" I asked.

"Three days before Tuesday. He said he was going to meet a friend. He never came back."

"What friend?"

She looked at me with those expensive eyes and said, "I don't know. He never told me who his friends were. But he talked about a man called the Doctor. He talked about him in his sleep."

I took the case because she paid me five hundred dollars up front and because something about her felt familiar, like a song I'd heard once and forgotten.

***

The Doctor's real name was Salvatore Moreno, though nobody called him that. He ran a little clinic in the Hollywood Hills that looked like a doctor's office from the street and something else from inside. I found out what it was on a Tuesday night, following a lead from a guy who owed me money and knew more than was good for him.

"Little" Billy Chen told me in a parking garage on Sunset, his voice trembling in a way that had nothing to do with the cold.

"Doctor Moreno's operation, Corvalis. It's not medicine. It's—look, people pay him to stop them from getting old. They take a shot, and they look the same. Every day, for years."

"That's not illegal. Lots of people—"

"Not the stopping part. The stopping part is fine. It's what the shot does after. It locks them. Their brain—his people put something in it that stops their consciousness from changing. They stay exactly who they are when they take the first dose. Forever. No new thoughts. No new feelings. They become..." Billy made a gesture with his hand, like a film reel frozen on one frame.

"Empty?"

"Like a house where everybody's left and forgot to turn off the lights."

***

I started looking. Really looking. Not the surface stuff—driver's licenses, hotel receipts, the kind of paper trail that leads to nothing. I was looking for the people who'd taken the shot and stopped changing.

I found four of them in three days.

The first was a woman named Gloria, who lived in a beautiful house in Bel Air and stared at a TV that was turned off. Her husband told me she'd been "on the Doctor's program" for eight years. "She's happy," he said. But he wouldn't look at her.

The second was a man named Arthur, who sat on a park bench in Brentwood every day from noon until sunset, watching the same patch of sky. He smiled when I talked to him, but it was the smile of someone who'd smiled that exact smile ten thousand times before.

The third was a woman named Lillian, who worked at a library but hadn't catalogued a single new book in twelve years. She could recite every catalog entry from before she took the shot. Word for word. She'd been reading the same page of the same book for a decade.

The fourth was Helen's husband, Robert. I found him in a hotel room off Wilshire, sitting on the edge of a bed that hadn't been changed since he arrived. He was twenty-eight years old. His driver's license said he was forty-one.

"Robert Walker?" I said.

He looked at me. His eyes were clear and bright and completely empty.

"Do you know why you're here?" I asked.

He smiled his ten-thousand-times smile. "I'm waiting for Helen," he said. In exactly the same tone, on exactly the same pitch, as the last time he'd said it. Twelve years ago.

***

I confronted Helen in her living room three nights later. She was sitting in front of a mirror, applying lipstick with a steady hand.

"You've been taking it," I said.

She didn't stop. "Taking what?"

"The shot. The thing that stops you from changing. From growing. From—"

"From becoming ugly?" She turned to face me. Her face was perfect. Twenty-five years old, not a day older. But her eyes were wrong. They were the eyes of someone who'd stopped looking at the world and started looking at herself in it.

"I'm scared, Jack," she said. "I'm thirty-two. I have fine lines around my eyes. I had a gray hair last week. A gray hair, in front of a private investigator who's probably older than me and knows exactly how fast time moves."

"So you stopped time?"

"I paid the Doctor five thousand dollars to make me stay young. Is that a crime? Is it a crime to not want to die?"

"It's a crime against yourself. You're not living. You're— you're a photograph that learned to walk."

She set down the lipstick and came toward me. Her movement was fluid, graceful, mechanical. Every step was the same as the last, and the last, and the last.

"Jack," she said, and her voice was different now. Slightly different. A hair off the pitch. "Maybe you're right. Maybe I'm a photograph. But at least I'm a beautiful photograph."

***

I went to the Doctor's office one last time. I didn't break in. I walked in during the day, when the receptionist was at her desk and the waiting room had three other patients sitting quietly, reading magazines they'd already read.

The Doctor was a small man with large hands and a smile that didn't reach his eyes. Which is to say it didn't reach them at all.

"Mr. Corvalis," he said. "How can I help you?"

"I know what you do. I know about the shot."

His smile didn't change. "We provide a service. We help people look their best."

"You stop them from thinking new thoughts. From feeling new feelings. You turn people into—"

"Into what?" He leaned forward. "Into something permanent? Something stable? You people in this city, you're all running. Running from aging, from failure, from the terrible uncertainty of tomorrow. I give you certainty. You will always look the same. You will always feel the same. Isn't that what everyone wants?"

I didn't have an answer. Because the truth was, part of me understood him. Part of me had wanted to take the shot too, back when Helen first mentioned it. The idea of never aging, never getting tired, never feeling the weight of another year—it was seductive.

But I also knew what it cost.

"I'm leaving," I said. "I'm not going to find you guilty of anything, because you haven't broken any laws. But I'm leaving, and I'm never coming back."

"Mr. Corvalis," he said, "you already took the shot."

I stopped in the doorway. "What?"

"The night you came to me. Three months ago. You don't remember because the shot makes you forget. But you were here. You asked for the shot. You paid me. You took it."

I felt the blood drain from my face. I tried to remember, but there was nothing. Just a gap. A blank space where three months should have been.

"Go home, Mr. Corvalis," the Doctor said gently. "Your wife is waiting for you."

***

I sat in my office that night and watched the neon signs blink outside my window. Rain started again. I didn't turn on the heat.

I thought about going home. I thought about finding Helen and asking her to take the shot with me. Two photographs, walking together through a city that never stopped changing.

I thought about it for a long time.

Then I picked up the half-empty bottle of whiskey on my desk, poured myself a glass, and drank it while the rain fell on Los Angeles like it always did, washing nothing clean.

***