The check arrived on a Tuesday, slipped under my door at 6 AM, no note, no name, just a cashier's check for five hundred dollars and a printed instruction sheet that said: Victor Blackwood died by suicide on April 12. I disagree. Investigate. Signed: A Friend.

I stuffed the check in my desk drawer and waited for the rest of the world to start up. It was 1947 Los Angeles, which meant the sun was already beating through the smog by seven and the traffic on Hollywood Boulevard was already sounding like a thousand car horns arguing with each other. I poured coffee from a pot that had been brewing since yesterday and sat down at my desk and decided, for the record, that I did not want this job.

But five hundred dollars in 1947 was a lot of money. It was the kind of money that made you overlook a lot of things. Including the fact that "A Friend" was probably nobody at all.

Victor Blackwood's bungalow sat on a hill in Hollywood Hills, the kind of place that cost more per month to rent than most workers made in a year. The facade was Hollywood—palm trees, a fountain that hadn't worked in months, a front door painted a color that was supposed to say "welcoming" but really said "I'm hiding something behind this door."

The house had been declared a suicide by the LAPD. Blackwood had shot himself in the head with his own .38, the gun found on the floor three feet from his body, his left hand dangling over the edge of a desk that held a half-written suicide note in a handwriting that matched Blackwood's studio correspondence perfectly.

Clean. Simple. Closed.

Except for the nail.

It was driven through Blackwood's chest, right where a heart would be if you believed in hearts the way coroners believed in hearts. The nail was about four inches long, industrial grade, the kind used in shipyard construction. Stamped near the head was a number: PY-447.

I bent down and looked at it closer. The nail had been driven with force—enough to penetrate the rib cage and lodge in the sternum. This was not someone who had shot themselves and then fiddled with their own body. This was someone who had driven a nail through Victor Blackwood's chest and then posed a gun next to him and wrote a note in his handwriting.

Which raised the question: who could write in Victor Blackwood's handwriting well enough to fool a coroner?

I took a photograph of the nail with my Contax, bagged it (bad idea—I knew it was a bad idea the moment I did it, but I've never been good at following protocol), and drove back to my office on Vine Street. The office was a single room with a frosted glass door that said CALLAHAN — PRIVATE INVESTIGATIONS in letters that were beginning to peel.

I put the nail in my desk drawer. I wrote nothing in my notebook. And I started making calls.

PY-447. I ran it through every industrial supply database I had access to—which wasn't many, because I wasn't LAPD and I didn't have connections in the supply chain. But I have other ways. I went to a guy named Sal Mercieri who ran a small scrap yard in San Pedro and knew everyone who worked in shipyards. Sal was sitting on a milk crate outside his yard, eating a sandwich that may or may not have been ham, when I showed him the number.

He spat out his chewing tobacco and wiped his mouth with the back of his hand. "PY nails. Pacific Grand. Shipyard on the waterfront."

"Which shipyard?"

"Number Three. Closed two years ago."

"What happened to it?"

Sal looked at me the way a man looks at a thermometer when he realizes he has a fever. "Collapse. Structural failure. Came down during construction. Eleven men were inside when it fell."

I felt something in my stomach tighten. "Were they all killed?"

"Nine died outright. Two in the hospital. Patrick O'Brien was the last to go. October 1945. He was twenty-three."

"Who owned the Pacific Grand?"

"Victor Blackwood. Through a shell company, technically. But everybody knew it was him."

I thanked Sal and drove to the records office. I pulled the shipyard collapse files—twenty-seven pages of testimony, inspections, and buried responsibility. The nails used in the construction were ordered by the Pacific Grand management. They were specified as Grade A industrial nails. The delivery receipt showed Grade C nails had been received. The inspection report noted the discrepancy. And then the report was marked "insufficient evidence for prosecution" and filed in a drawer that nobody opened for two years.

Grade C nails. The same grade that had been stamped PY-447 and driven through Victor Blackwood's chest.

I was at my desk at midnight, staring at the nail under a lamp, when the phone rang. It was a number I didn't recognize. I picked up.

"Mr. Callahan?" A woman's voice. Young, maybe twenty-five. Jazz singer's voice—breathy, practiced, but with an undercurrent of something real. "My name is Maeve Kelly. I work at the Copper Lane Club. I think I know who killed Victor Blackwood. And I think you'd better come down tonight."

The Copper Lane Club was in Skid Row, the kind of place that existed in the gaps between Hollywood's glitter and downtown's poverty. Maeve Kelly was twenty-four, with red hair dyed to a color that was almost too red, and eyes that had seen things she wouldn't talk about over the phone.

She was sitting at a corner table, a glass of bourbon half-empty in front of her, smoking a cigarette with the careful deliberation of someone who had perfected the art of looking important while saying very little.

"I knew Victor," she said when I sat down. "Not well. He was a regular. He came to see me perform. Left big tips. Never asked for more than the music."

"The nail," I said. "Shipyard nails. Pacific Grand. Patrick O'Brien."

Maeve's hand froze halfway to her cigarette. She set it down slowly. "Patrick O'Brien was a nailsmith," she said. "Not a killer. He was a man who worked with his hands. He built things."

"Until the shipyard fell down."

She looked at me for a long time. Then she leaned forward and said, "Patrick didn't kill Victor Blackwood."

"Then who did?"

"That's the easy part. The hard part is figuring out why it doesn't matter." She took a drink. "Blackwood wasn't killed because of the shipyard. He was killed because he was cleaning up. Cleaning up loose ends. The shipyard was just the beginning."

"Who was he cleaning up?"

Maeve reached into her purse and pulled out a folded piece of paper. She slid it across the table. It was a list. Twelve names. Victor Blackwood's handwriting. Each name was next to a date and a brief notation: "Shipyard inspector – signed off on C-grade nails." "Union rep – took kickbacks." "City councilman – votes on waterfront zoning." "Journalist – writing exposé."

"He was going to silence them," Maeve said. "All of them. The shipyard collapse wasn't an accident. It was a cover-up. And Blackwood was the one who had to clean up the people who knew."

"Then someone beat him to it."

She nodded. "Someone who knew the list. Someone who had access to it. And someone who uses nails as a signature because the nails are the point."

I thought about PY-447. Grade C nails. Eleven dead men. A list of twelve names. Blackwood had been number one.

"How many on the list have you seen die?" I asked.

Maeve was quiet for a moment. "Two. I've heard about two."

I stood up. "Thank you, Miss Kelly."

"Don't thank me," she said. "Pray you're not number thirteen."

I drove home through streets that were empty except for the occasional taxi and a streetcar that clanged past like a ghost from a different decade. I parked in front of my building, sat in the car for five minutes, and thought about what to do next.

The list had twelve names. Blackwood was one. Two more were dead. Nine remained. If Maeve was right, the killer was working through the list methodically, using the same weapon each time—nails, always nails, always Grade C from the Pacific Grand shipyard.

I drove to the address of the next name on the list: a building inspector named Arthur Voss, who lived in a small apartment in Westlake. I arrived at 3 AM. The apartment was dark. I went up the stairs three at a time, my .38 in my pocket, my heart hammering.

The door was unlocked. I entered and found Voss on the kitchen floor, a nail driven through his chest. PY-447. The same number.

I was too late. Again.

I backed out of the apartment and drove to the Hollywood studios, to the soundstage where Blackwood had produced his last three pictures. The lot was empty except for a security guard who nodded at me and went back to his paper. I walked through the empty sets—fake Parisian streets, painted backdrops of Mediterranean harbors, a New York skyline that was just plywood and paint.

And there, in Sound Stage 4, I saw him.

A man in coveralls, carrying a hammer and a box of nails. He was standing in front of a set wall, hammering something into the wood. He stopped when he saw me.

"Can I help you?" he said. He was young—maybe twenty-five, lean, with the tired face of a man who had stopped expecting things to get better.

I looked at the nail in his hand. I looked at the box. PY. Pacific Grand.

"Are you Patrick O'Brien?" I asked.

He didn't answer. He set the hammer down on the workbench. He opened the box and took out a nail. He held it up to the light.

"Eleven men died in that shipyard," he said. His voice was not angry. It was flat. The way a man's voice is flat when he has said the same thing a hundred times and knows that saying it again will not change anything. "Nine died in the collapse. Two died from the stress. My friend Jerry—he couldn't sleep for two years. His wife left him. He drank himself to death. That's eleven."

"How many more?" I asked.

He looked at me. "How many are left on the list?"

"I don't know."

He nodded slowly. "I do. Eight."

I didn't move. He didn't move. We stood in a fake Parisian street on an empty studio lot, and the only sound was the hum of fluorescent lights above us.

"You going to arrest me?" he asked.

I thought about it. I thought about the list. I thought about Blackwood and his twelve names and the six people he'd already had killed to cover up the shipyard collapse, and the five more who knew and needed to be silenced, and the man who was doing it all with a hammer and a box of nails and a grief so vast it had turned into something that looked exactly like justice.

"I'm going to drive home," I said. "And I'm going to drink some whiskey. And tomorrow I'm going to decide whether this job is worth doing."

Patrick O'Brien nodded. He picked up his hammer. He picked up his box. He walked out of the soundstage into the Los Angeles fog, and I let him go.

I drove home. I drank whiskey. I didn't sleep.

The next morning, I went to my office and found a envelope on my desk. No stamp. No postmark. Delivered by hand. Inside was a photograph—Lt. Frank O'Brien of the LAPD, shaking hands with Victor Blackwood at a charity gala. The date on the back: March 1946.

O'Brien was on the list. He was number seven. He was next.

I put the photograph in my desk drawer, next to the nail. I made another cup of coffee. I waited for the phone to ring.

--- OBJECTIVE TENSOR MEASUREMENT SYSTEM v2.0 — CODE Work: Evidence of Steel (Variant V-03 — Film Noir) TI: ~88.0 (T1 Despair Level — Zero Redemption) | Angle: 240° (Dark Irony) M1=7.5 M2=0.0 M3=6.0 M4=3.0 M5=5.0 M6=10.0 M7=4.0 M8=0.0 M9=0.0 M10=2.0 N=[0.50, 0.50] | K=[0.60, 0.40] E_total: 10.8 | V=0.80 I=0.90 C=0.40 S=0.6 R=0.0 OTMES-v2-EOS-V03-E055B3-E0834-M0-T045-9C69