The woman who called me her uncle walked into my office at half past two on a Tuesday, which was already suspicious because nobody visits a private investigator at that hour unless they are either in trouble or trying to get me into trouble. She was young — mid-twenties — and she had the kind of beauty that makes you check your reflection in a window three days later. But it was her eyes that got me. Pale gray, almost translucent, and they were looking at me the way a person looks at a door they think might lead somewhere.

"Your name is Marcus Cole," she said. It wasn't a question.

"That's what the door sign says."

"My name is Clara. I am your niece."

I put down the glass of whiskey I had been drinking at two in the afternoon, which is not unusual for a Tuesday. "I don't have any relatives I know of."

"You will." She put a photograph on my desk. It showed a man standing in front of a building I recognized as a lighthouse — not the tourist kind with a gift shop, but a real one, dark stone, no windows on the lower floors. The man was old, bent, looking away from the camera at something in the sea. "This is my father. He lives on an island. He wants to see you."

"Your father wants to see me, and he sends you — his daughter — to find me instead of calling?"

"He doesn't have a phone."

"Where is this island?"

She slid a piece of paper across the desk. It was a boat schedule. A route from Bar Harbor to a place called Black Rock. Black Rock wasn't on the map I had in my office, which meant it was either very small or very secret. Probably both.

"I need to find him," she said. "And I need you to help me because he said you would help. He said you solve things that are broken."

"What is broken?"

She looked at me with those pale eyes, and for a second I saw something in them that wasn't there before — something like fear, but older. "My star is going out," she said. "And if my star goes out, I go out with it."

I should have laughed. Instead, I picked up my coat.

***

The boat ride took eight hours. The sea was flat as glass and the sky was the color of a bruise. The captain didn't speak to me the whole way. He pointed at a rock when we arrived, and I stepped onto it, and the rock had a lighthouse on it, and the lighthouse had a man standing in front of it, and the man said: "You're late."

"I don't even know you."

"You know me enough. Come inside. The tide is turning."

The inside of the lighthouse was dark except for a single lamp that burned with a light I can only describe as blue-white — not the warm yellow of an ordinary bulb, not the cold white of a hospital. It was a color that didn't seem to have a name. The walls were lined with books — hundreds of them, most of them old enough that the pages crumbled when I looked at them wrong. There were star charts on every surface, drawn by hand in ink so dark it was almost black.

"I'm Marcus," I said, which felt ridiculous in a room full of stars.

"I know." He moved past me and closed the door. "You drink. You don't sleep. You take cases you can't solve because you'd rather fail at something interesting than succeed at something boring. Is that right?"

I didn't answer. He was wrong about the boring part, but right about the rest, and that made me suspicious.

"My name doesn't matter," he said. "But you can call me the Watcher. Your father knew me. Your father was a good man. He tried to leave. He didn't make it far."

"My father is dead."

"No. He is here. He is still here. He is just not where you can see him."

That should have been the moment I walked out. It wasn't. Because something in the way he said it — something that sounded like truth, not riddle — hooked into my chest and pulled.

He showed me the top of the lighthouse. The lens was enormous, bigger than any I'd ever seen, made of glass prisms arranged in a pattern that didn't match any design I'd ever heard of. "What is this for?" I asked. He said: "For the ships." I said: "There are no ships that come here." He said: "Some of them don't need charts."

At 3:17 in the morning, he woke me. "Come on," he said. I followed him down the stairs, through the door, into a small boat. We paddled to a place the sea opened up like a wound — black water, no wind, no sound except the occasional bubble rising from below. The Watcher produced a metal canister, opened it, retrieved something dark and heavy, and dropped it over the side.

The sea glowed blue.

Not reflected blue. Not bioluminescent blue. A light that came from beneath the surface, from something the water was holding, and it was the color of a sky you've never seen because you've never been there. It spread outward in a circle, illuminating the boat, the water, the Watcher's face, which was — I'll tell you the truth — not human. Not entirely. It was human-shaped, but something about it was off, like a photograph that's been copied too many times.

The glow lasted for exactly two minutes. Then it was gone. The sea was black again. The Watcher started the paddle. We returned to the lighthouse in silence.

"I need to go home," I said the next morning. "My niece — Clara — she needs me."

The Watcher sat at a desk covered in star charts and looked at me for a long time. "Why does she need you?"

"Because I am the only family she has."

"That's not why." He leaned forward. "She needs you because she can see them."

"See what?"

"Things that exist between the stars. Things that live in the dark between the light. She sees them, which is why her star is dimming — not because she is sick, but because she is aware. Awareness drains the star, Marcus. Everything you know about stars and sickness is correct, but you have the direction wrong. It is not the star that makes the person. It is the person that makes the star. And Clara sees too much."

I should have walked out then. I didn't.

Clara's letter arrived on a Thursday. "Marcus," it said, "I am better. I don't know what you did, but I am better. Please come home." I read it three times and then I read it again. The Watcher stood behind me, reading it over my shoulder.

"You should go," he said.

"I am going."

"After you feed the flare."

"I feed the flare?"

"You lit one at 3:17 last night. You just didn't know it was you."

I went to the top of the lighthouse at 3:17. The Watcher handed me a match. I struck it. I lit the flare. It burned blue. The sea glowed. Something moved beneath it — large, slow, and I knew with a certainty that was not reasoning but knowing that it had been waiting, and that it had noticed me noticing it.

The Watcher did not come up to the top. I did not call for him. When I came down, his chair was empty. I called his name. No answer. I searched the lighthouse. No answer. I went outside. The dock was empty. The sea was calm.

I went to the bottom of the lighthouse and opened the door and the sea was there and the sky was there and the Watcher was not.

I went back up the six flights of stairs. I sat at the desk. I opened the logbook. I wrote: "Day —. Weather: calm. Sea: calm. Watcher: absent. Flare: lit."

I closed the book. I waited. The night was long. I lit a candle. I watched the sea. It was darker than it should have been. I lit another candle.

--- OBJECTIVE TENSOR ENCODING SYSTEM v2 (OTMES) ========================================== Code: OTMES-v2-RXN-03-DE38DE-E1214-M7-T028-5579 E_total: 12.14 | Dominant Mode: M7 | Variant: V-03 M_vector: [8.0, 0.5, 4.0, 7.0, 3.0, 8.0, 7.0, 7.5, 3.0, 4.0] N_vector: [0.60, 0.40] K_vector: [0.40, 0.60] Irreversibility: 0.9 | Tragedy Index: 82.1 (T1) Style: D/F - Film Noir / Psychological Thriller