Chapter 1 - Three Knocks at Two in the Morning
Mia pointed at the bookcase and whispered, "There. It's happening again."
I stepped into my study and found a brass key lying beside her cleaning cloth.
Three tiny scratches had been carved into its head.
They matched three scratches on my library wall.
This wasn't a child imagining noises.
Knock.
Knock.
Knock.
The third sound seemed to travel through the mahogany shelves and into my chest.
Mia Harper didn't scream.
That bothered me more than if she had.
She simply stood beside my desk with one hand curled around a damp cloth and the other reaching backward to touch the sleeping baby strapped securely against her.
"See?" she whispered.
I stared at the bookcase.
For years, that wall had been background.
Books. Mahogany. Brass picture lights. A marble bust my father had bought because he believed rich men were supposed to own things that looked ancient.
I'd walked past it thousands of times.
Nothing was behind it.
At least, nothing was supposed to be.
I looked at Mia.
"How many times have you heard that?"
Her eyes moved toward the floor.
"I don't know."
"Mia."
"A lot."
"How many?"
She swallowed.
"Maybe every night Mama brings us."
The answer landed harder than the knocking.
"Your mother brings you here at night?"
"Only when she can't find Mrs. Alvarez."
"Who is Mrs. Alvarez?"
"The lady downstairs who watches us."
I knew none of this.
Grace Harper had worked in my house for eight years.
Eight years.
I knew which polish she used on the dining table. I knew she preferred the service entrance even though I'd told the staff they could use whichever entrance they wanted. I knew she never missed a Monday.
I didn't know she had two daughters.
That realization embarrassed me.
I had spent the evening sitting across from men who controlled companies, buildings, pension funds, and political donations. I could remember the details of contracts I'd read six months earlier.
Yet a woman had worked under my roof for eight years, and I had never learned enough about her life to know that her six-year-old daughter was afraid one sick day might leave them homeless.
My gaze dropped to Mia's hands.
Red.
Cold.
Too small for the work she was trying to do.
"Put the cloth down."
Her face went pale.
"I can finish."
"No."
"I won't touch anything expensive."
"Mia."
"I promise."
Her lower lip trembled.
"Please don't fire Mama."
"I'm not firing anyone."
She stared at me.
Children know when adults lie.
Apparently, they also know when adults are telling the truth.
Some of the tension left her shoulders.
"Really?"
"Really."
Her eyes filled immediately.
She blinked hard.
I pretended not to notice.
"Where is your mother?"
"Home."
"How sick?"
"She has a fever."
"And she sent you here?"
Mia shook her head so violently that Lily stirred against her back.
"No. Mama told me not to come."
"Then how did you get inside?"
Another hesitation.
I looked at the brass key.
Mia followed my eyes.
"Mama's key."
"You took it?"
"I borrowed it."
Despite everything, I nearly smiled.
"Does your mother know you borrowed it?"
"No."
"That's generally the difference between borrowing and stealing."
Mia's face collapsed.
"I'm sorry."
"I'm not accusing you."
I picked up the key.
It was an ordinary service key, except for the scratches.
Three parallel marks.
I turned it under the desk lamp.
"Did you do these?"
"No."
"Your mother?"
"I don't know."
I walked toward the bookcase.
Mia immediately said, "Don't."
I stopped.
It wasn't loud.
But there was something in the way she said it.
Not childish imagination.
Memory.
I turned.
"Why?"
She glanced toward the shelves.
"Because when Mama heard it, she got scared."
"When?"
"Last week."
"What did she do?"
"She made me put my coat on."
"Did she investigate?"
Mia shook her head.
"She grabbed Lily and we left."
"Did she say anything?"
Mia thought.
"She said, 'Not again.'"
The room suddenly felt smaller.
"Those exact words?"
She nodded.
Not again.
That meant Grace knew something.
I pulled out my phone.
1:56 a.m.
Calling a sick employee at two in the morning because her daughter had broken into my house was already an unusual conversation.
Calling because something was knocking inside a wall was worse.
I dialed.
The phone rang.
Once.
Twice.
Three times.
Someone answered.
But no one spoke.
"Grace?"
Silence.
"Grace, it's Adrian Duca."
A breath came through the receiver.
Then a woman's voice.
Weak.
Frightened.
"Mr. Duca?"
"Your daughters are with me."
A gasp.
"Oh, God."
"They're safe."
"I'm coming."
"No. You're sick."
"I said I'm coming."
"Grace—"
"Please don't touch that wall."
I looked at the bookcase.
Mia was watching me.
"What wall?"
Grace became silent.
I waited.
"Grace."
"I'll explain when I get there."
"You just told me not to touch a wall I didn't mention."
Nothing.
My grip tightened around the phone.
"How long have you known?"
"Please."
"Known what?"
"I can't do this over the phone."
"Then tell me one thing."
Silence.
"Is there someone behind my bookcase?"
Grace whispered something.
I almost didn't hear it.
"No."
My shoulders loosened slightly.
Then she added:
"Not anymore."
The line went dead.
I stared at my phone.
Mia whispered, "Is Mama mad?"
"No."
"Are you mad?"
I looked toward the wall.
"I'm starting to be."
But not at Grace.
I called my security chief, Daniel Ross.
Daniel answered on the second ring.
"This better involve either fire or murder."
"Come to the house."
Silence.
"Adrian?"
"Bring the original architectural plans."
"What happened?"
"I found a wall."
"You own several."
"This one knocks."
Another silence.
"I'll be there in twenty minutes."
I ended the call.
Mia had moved closer to the desk.
"Mr. Duca?"
"Adrian."
She frowned.
"What?"
"You can call me Adrian."
"Mama says that's disrespectful."
"Your mother isn't here."
"She's coming."
"Good point."
Mia looked toward the bookcase again.
"Do you believe me now?"
I studied her.
"Yes."
The word seemed to matter.
She nodded once.
Then Lily began to stir.
A small sleepy sound escaped the baby.
Mia immediately reached backward.
"It's okay."
She bounced gently.
"Go back to sleep."
I watched her.
"How old is Lily?"
"Eleven months."
"And you carry her often?"
"When Mama cleans."
"Does your mother have anyone helping her?"
Mia shrugged.
"Me."
That answer hurt.
I walked toward the sofa.
"Sit."
"I need to finish."
"The study can survive being dirty."
"But Mama—"
"Still has her job."
"Even if I don't finish?"
"Especially if you don't finish."
She studied me suspiciously.
Then slowly sat.
I found a blanket in the cabinet and brought it over.
Mia stared.
"What?"
"Nothing."
"Take it."
She wrapped it around herself without removing Lily from the carrier.
"Thank you."
I crouched so we were closer to eye level.
"Mia, I need you to think carefully."
She nodded.
"When did you first hear the knocking?"
"Before Christmas."
It was September.
My stomach tightened.
"Nine months ago?"
"I didn't know it was knocking then."
"What did you think?"
"Pipes."
"Why?"
"Mama said pipes make noises."
"They do."
"But pipes don't do three."
I looked toward the wall.
"No."
"They don't."
"Did it always happen at night?"
She nodded.
"Always three knocks?"
"Sometimes scratching."
"Where?"
She pointed.
Third shelf from the floor.
Far right section.
I stood.
"Mia, stay here."
She grabbed my sleeve.
"Don't."
I looked down.
Her fingers were trembling.
"Why are you afraid?"
"Because Mama cried."
"When?"
"The first time I told her."
That stopped me.
"Your mother cried?"
Mia nodded.
"She asked exactly where I heard it. Then she made me promise never to tell anyone."
"Why did you tell me?"
Her eyes became uncertain.
"I thought..."
"What?"
"Maybe whoever's inside wanted you to know."
I turned toward the shelves.
My father had designed this study.
That fact returned to me suddenly.
Not the architect.
My father.
He had insisted on the room's proportions, the custom shelves, the imported wood.
He had spent years here.
He had died here too.
Heart attack.
At this desk.
I looked at the brass key again.
Three scratches.
Three knocks.
Coincidence was a word people used when they didn't want to investigate patterns.
I walked to the bookcase.
Mia didn't stop me this time.
I touched the panel where she'd pointed.
Solid wood.
I knocked.
Nothing unusual.
I moved three books.
Behind them was wood.
I pressed.
Nothing.
Then my fingers touched something.
A tiny indentation.
No larger than a pencil eraser.
I leaned closer.
It wasn't damage.
It was deliberate.
A keyhole.
I looked down at the brass key.
No.
Impossible.
The key was for the service entrance.
Or so I'd always believed.
I inserted it.
Perfect fit.
Mia stood.
"Mr. Duca..."
I turned the key.
Click.
Something released inside the wall.
A seam appeared between two shelves.
My pulse accelerated.
I pulled.
The entire bookcase moved forward half an inch.
Mia whispered, "There's a door."
Before I could answer, headlights swept across the windows.
A car stopped outside.
Grace.
I moved toward the doorway.
Then I heard something else.
Not outside.
Behind me.
From the narrow black seam in the bookcase.
A phone began ringing.
Mia froze.
I froze.
The ringing continued from inside a room that wasn't supposed to exist.
Then a man's voice behind the wall answered it.
May you like
"Adrian is home."
And the bookcase slowly began opening from the inside.
