I felt my chest tighten.

"What did he do?"

"He helped move one shipment."

I shook my head.

"No."

"He believed it was ordinary contaminated soil. He didn't know what was inside. By the time he found out, Daniel was already dead."

"You're saying my father helped them?"

"Not knowingly."

"How can I believe you?"

Claire placed one of the photographs on the table.

It showed a group of workers beside a truck. My father stood near the rear, holding a clipboard. Martin Cole stood beside him.

On the truck was a faded logo.

Northfield Environmental Services.

The date was stamped in the lower corner.

JUNE 14, 1994.

I recognized my father's handwriting on the clipboard.

"Why would he do that?"

"Because Harrow told him the shipment contained soil from an excavation site. He was responsible for checking the transport records. He signed them."

"And Daniel found out?"

"Yes."

I looked at the cassette.

"What did Daniel say?"

Claire took a breath.

"He said there was another shipment. One that never appeared in the records."

"Where did it go?"

"Under the river."

Bennett unfolded one of the maps.

It showed Briar Glen, the old pumping station, and a network of underground channels extending toward the river.

At the far end was a small square marked with a number.

17.

The service compartment.

The place my father had described.

But there was another marking beside it.

A handwritten word.

HOLDING.

I looked up.

"What does that mean?"

Claire closed her eyes.

"It means the chamber wasn't built to drain water."

"Then what was it built for?"

She looked at me.

"To store whatever they couldn't move without leaving a record."

A noise came from the back of the house.

A door closing.

Bennett drew his weapon.

"Stay here."

He moved down the hallway with the other officer.

I heard footsteps, then a brief struggle.

A moment later, Bennett called out.

"Clear."

He returned holding a small envelope.

"Someone left this outside the back door."

My name was written on it.

Inside was a single photograph.

My mother stood beside the river.

She was wearing the crescent pendant.

Beside her was a man with his back to the camera.

His right hand rested on her shoulder.

I knew the shape of that hand.

I knew the way he held his head.

I knew the coat.

It was my father.

On the back of the photograph were six words.

SHE KNOWS WHERE ROBERT IS BURIED.

I looked at Claire.

She had gone completely pale.

"What's wrong?" I asked.

She whispered:

"That's not Robert."

I turned the photograph over again.

"Then who is it?"

Claire stared at the man beside my mother.

"Daniel Ruiz."

Bennett looked at her sharply.

"That's impossible. Daniel died in 1994."

Claire shook her head.

"That's what we were told."

She pointed to the man's right hand.

"Look at his little finger."

There was a deep scar across the knuckle.

I had seen that scar before.

On my father's hand.

I looked up.

Claire was crying.

"Robert had the same injury," she whispered. "But Daniel didn't."

I stared at the photograph until the faces seemed to blur.

The man beside my mother could be my father.

Or someone who had spent years pretending to be him.

Then my phone rang.

An unfamiliar number.

I answered.

For several seconds, there was only breathing.

Then a man's voice spoke.

"Son?"

I couldn't move.

It was a voice I had not heard since childhood.

Older now.

Rougher.

But unmistakable.

My father's voice.

"Where are you?" I whispered.

The man gave a short, tired laugh.

"Somewhere you should never have gone looking."

"Are you alive?"

A pause.

"That depends on what you mean by alive."

I gripped the phone.

"Who is the man in the photograph?"

Another pause.

Then he said:

"Don't believe Claire."

The line went dead.

And from somewhere beneath the house, I heard three slow knocks.

Like someone asking to be let out.

PART ELEVEN — THREE KNOCKS BELOW

The three knocks came again.

Slow.

Deliberate.

Three hollow sounds rising through the floorboards beneath Claire Hale's living room.

Nobody moved.

Officer Bennett raised one hand, signaling us to stay quiet. His partner drew her weapon and moved toward the hallway.

I stared at the floor.

The sound came from somewhere below us.

Not from the basement door. Not from the pipes.

From underneath the house itself.

"Does this building have a cellar?" Bennett whispered.

Claire shook her head.

"Not officially."