I buried my only daughter 8 years ago — then, at the school where I work, I saw a girl who looked exactly like my daughter would have if she were still alive.

She was right.

I knew it the moment she said it.

The way she held herself — very still, very controlled, the way someone holds themselves when they have been waiting a long time for the ground to stop moving — told me she had been carrying suspicions she had never been allowed to voice.

"What do you already know?" I asked.

"I know my father didn't just disappear," she said.

"I know because the week before he left, he was different.

He kept checking his phone.

He drove me to school himself instead of letting me take the bus.

He made me memorize a phone number." She looked at Paul.

"Your number."

Paul's head came up.

"He made you memorize my number," Paul said.

"He said if anything ever happened and I needed help, I should call that number.

He said the man who answered would know what to do." She paused.

"I never called.

I was too scared.

And then I ended up here, at this school, and I walked into her classroom—" She glanced at me.

"And I thought maybe it wasn't an accident."

"What do you mean?" I asked.

"The Nguyens enrolled me here.

I didn't choose it.

But the school is twenty minutes from where we live.

There are two closer schools." She folded her hands in her lap.

"I looked it up.

I wanted to understand why they picked this one."

I sat down across from her.

"Did you find anything?"

"I found that this school is listed in my father's old files.

I went through his things after he left.

The Nguyens let me keep two boxes." She reached into her bag and pulled out her phone.

She turned it to face me.

On the screen was a photograph of a handwritten note.

The handwriting was neat, precise, the handwriting of someone trained to write clearly.

A doctor's handwriting.

The note said: *If something happens — Lily goes to Westfield High.

Room 14.

Teacher: Ellen Marsh.*

My name.

My room number.

I looked at Paul.

He was reading the note over my shoulder.

His face had gone the color of old paper.

"He planned this," I said.

"He planned this," Lily confirmed.

"He wanted me to find you.

Both of you.

I just didn't know why until right now."

The three of us sat with that for a moment.

The clock kept ticking.

Outside, the bell rang for the end of fourth period and the hallway filled with noise — lockers, voices, sneakers on linoleum — and then it emptied again.

"Lily," Paul said, "did your father ever mention anyone else?

Anyone who might have had a reason to want him to disappear?"

She hesitated.

"There was a man," she said.

"He came to our house twice.

The second time, my father made me go upstairs and stay there.

But I sat at the top of the stairs and I listened."

"What did they say?"

"The man said my father had something that belonged to him.

Documents.

He said if my father didn't hand them over, he would make sure my father lost everything." She paused.

"My father said the documents weren't his to give.

He said they belonged to a family."

Paul and I looked at each other.

"He said they belonged to a family," I repeated.

"Yes." Lily looked at me steadily.

"I think he meant you."

I stood up and went to my desk drawer.

I unlocked it with the small key I kept on my lanyard and pulled out the folder I had been keeping there for three weeks — the folder I had started the day Lily walked into my classroom, when something in my gut told me I needed to start writing things down.

I set it on the desk.

"Then we need to find out what those documents are," I said.

"And we need to find out who that man was."

Lily reached into her bag again.