At exactly 1:58 a.m., my eight-year-old granddaughter called me and whispered that she felt like she was burning alive.

The closet knob moved another quarter inch while Lily trembled against my chest.

I stepped back so fast my shoulder struck the hallway wall.

The dispatcher was still speaking through my phone, asking whether I could hear sirens yet, but all I could hear was that soft metallic click from the lock.

Then the knob stopped.

A child's voice came through the door.

"Grandpa?"

It was Mason.

My knees nearly gave out.

"Mason, it's me."

There was a scraping sound, followed by a weak sob he tried to swallow.

"Don't let them come back."

I shifted Lily higher in my arms and grabbed the knob.

It would not open.

There was a small brass keyhole beneath it, and the lock had been turned from the outside.

On the floor beside the baseboard, I saw a bent plastic card, a cracked toy car, and three pale scratches in the paint where Mason had apparently tried to pry his way out.

"How long have you been in there?"

He did not answer immediately.

"Mason?"

"I don't know."

His voice sounded dry and hoarse.

"Dad said I had to stay until they came back."

A coldness moved through me that had nothing to do with the air in the house.

"Why?"

Lily suddenly made a small frightened sound and buried her face against my shirt.

From inside the closet, Mason whispered something I almost did not hear.

"Because I saw what they put in her cup."

The sirens were close now.

I looked back toward the kitchen counter where the orange prescription bottle stood beside Brian's note.

My own son's handwriting seemed uglier every time I saw it.

"Mason, I'm going to get you out."

"No."

"The police are coming."

"No, Grandpa."

His voice sharpened with panic.

"Dad said if I opened the door, he would know."

I stared at the ceiling.

That sentence made no sense until I noticed the tiny black circle in the smoke detector above the hallway.

It did not look like the other detectors in the house.

A faint red light blinked once behind the plastic grille.

A camera.

Someone had placed a camera directly over the closet.

"Dispatcher," I said, forcing my voice steady.

"I think there is a camera in the hallway, and I have a second child locked in a closet."

Her tone changed instantly.

"Do not touch the camera."

"I'm not leaving him in there."

"Officers are arriving now."

Blue light flashed across the front windows before she finished the sentence.

I heard car doors slam outside.

Then heavy footsteps hit the porch.

"Police!"

"In here!"

Two officers entered first, followed by paramedics carrying equipment.

Everything happened at once after that.

A paramedic reached for Lily.

I did not want to let her go.

For one irrational second, I thought that if I released her she might disappear the way Carol had disappeared from a hospital bed two years earlier.

The paramedic looked me directly in the eyes.

"Sir, we need her now."

I handed Lily over.

Her fingers clung to my collar.

"Grandpa."

"I'm right here."

"Don't leave Mason."

"I won't."

The officers found the closet key hanging on a hook inside the pantry.

Not beside the closet.

Not on a key ring.

Hidden behind a stack of grocery bags.

One officer photographed it before touching it.

Then he unlocked the door.

Mason was sitting on the floor between winter coats and a vacuum cleaner.

He wore one sock.

His other foot was bare.

His face was gray with exhaustion, and there was a red mark around one wrist where he had apparently pulled against something.

A plastic zip tie lay cut and twisted beside him.

He squinted into the hallway light.

When he saw me, his expression collapsed.

He lunged forward and wrapped both arms around my waist.

I bent over him, one hand on the back of his head.

"I've got you."

He shook so violently I could feel it through my shirt.

"I tried to help her."

"I know."

"I tried."

"I know."

The second paramedic knelt beside us.

"Mason, can I check you out?"

He tightened his grip on me.

"Grandpa stays."

The officer nearest the kitchen had begun reading Brian's note.

His jaw hardened by the time he reached the last line.

"Sir, is Brian your son?"

"Yes."

"And Marissa is his wife?"

"Yes."

"Do you know where they are?"

"They told the family Florida."

Mason looked up immediately.

"They're not in Florida."

The officer crouched.

"Do you know where they went?"

Mason looked toward the blinking camera in the smoke detector.

Then he pressed his lips together.

The officer followed his gaze.

"Is someone listening to us, Mason?"

Mason nodded.

"Dad can watch from his phone."

The officer stood and signaled to his partner.

Within seconds, the router was unplugged and the camera was covered without being removed.

Mason finally breathed out.

It sounded like he had been holding that breath for hours.

"They said Florida because Grandma's friends ask questions."

I felt my throat tighten at the word Grandma.

Carol had been dead for twenty-six months, but to Lily and Mason she was still simply Grandma, as present in the house as a framed photograph.

"Where did they really go?"

Mason glanced at the paramedic.

"The lake place."

I frowned.

"What lake place?"

"I don't know."

"Did you hear a name?"

He looked down at his hands.

"Dad said nobody could know until the papers were signed."

One of the officers turned toward me.

"What papers?"

"I have no idea."

That was when the paramedic working on Lily called for his partner.

The urgency in his voice froze every adult in the hallway.

"We need to move now."

Lily's eyes had closed completely.

Her skin was flushed and damp.

The paramedic slipped an oxygen mask over her face while another attached a monitor.

"What's happening?"

"Her heart rate is too high, and she's not responding normally."

"What did they give her?"

"We don't know yet."

My eyes went to the prescription bottle.

The officer placed it into an evidence bag.

"We'll send this with the medical team."

Mason suddenly grabbed my sleeve.

"That isn't the bottle."

Everyone stopped.

The officer looked down at him.

"What do you mean?"

Mason pointed weakly toward the orange bottle on the counter.

"Mom switched them."

I felt something drop inside my chest.

"Switched what?"

"The bottles."

He swallowed.

"The one they used on Lily was blue."

The officer's face changed.

"Where is the blue bottle now?"

Mason looked toward the stairs.

"Dad took it."

"When?"

"Before they left."

The paramedics rolled Lily toward the door.

I moved with them automatically.

Mason refused to leave my side, so the second crew guided him out with us.

As we crossed the living room, something on the coffee table caught my eye.

A glossy brochure had been half-hidden beneath a magazine.

LAKE HOLLOW RESORT AND CONFERENCE CLUB.

I grabbed it before an officer stopped me.

"Sir, please don't touch anything else."

"My grandson said a lake place."

The officer took the brochure with gloved hands.

A room number had been written on the back in Brian's handwriting.

417.

Under it were three words.

Pike.

Originals.

Tonight.

I knew the name Pike.

Howard Pike had handled Carol's estate.

He had also handled the education trust she left for Lily and Mason.

My pulse began pounding for an entirely different reason.

"I know who Pike is."

The officer looked at me.

"Who?"

"My family's attorney."

Mason stared at the brochure.

Then he whispered something that made the officer reach for his radio.

"That's the man Dad said would make Grandpa disappear on paper."

I looked at my grandson.

"What does that mean?"

Mason's eyes filled with tears.

"I don't know."

He swallowed hard.

"But that's why they locked me in the closet."

The ambulance doors opened behind us.

A paramedic called my name.

Lily needed to leave now.

I climbed inside beside her, but before the doors closed, one of the officers hurried over and held up Brian's handwritten note inside an evidence sleeve.

"Mr. Whitaker, one more thing."

"What?"

He turned the note over.

There was writing on the back that I had not seen.

A second message.

This one was not addressed to me.

It was addressed to Mason.