MAFIA BOSS THOUGHT A SIX-YEAR-OLD GIRL WAS PLAYING DETECTIVE WHEN SHE ASKED HIM TO BE HER PARTNER—BUT WHAT SHE FOUND UNDER HIS STAIRCASE MADE HIS ENTIRE CRIMINAL EMPIRE LOOK VULNERABLE!

Sophie took the assignment with the grave attention of a six-year-old being told where the treasure was buried. She repeated Dante's instructions twice, tapping the silver button on her canvas bag each time she got a word right. Watch the staircase. Act normal. Tell nobody, not even Daddy.

Dante heard the last part in her voice and felt something he had not expected: shame.

“Wait,” he said.

She stopped halfway through adjusting her detective hat.

“I gave you a bad instruction.”

Sophie frowned. “Detectives aren't supposed to do that.”

“No. They aren't.” He lowered himself onto the stone border of the rose bed. “You are not going to watch the staircase. You're not going to look for the person who put that thing there. That is my job.”

“Then what is my job?”

“Being six. Solving cookie crimes. Telling your father everything that worries you.”

“But classified means secret.”

“Sometimes adults use that word to make a bad idea sound important.”

She considered this, with the frankness that made conversations with her harder than negotiations with men carrying guns. “Are you a bad detective?”

“Yesterday, I might have been.”

“Today?”

“I'm trying to improve.”

Sophie pressed the silver button into his hand. For a moment he thought she was returning her badge. Instead she curled his fingers around it and said, “Keep it until you learn the rules.”

Then she trotted toward the garden cottage, where Daniel Carter was carrying a basket of deadheaded roses to the compost bins.

Dante watched father and daughter meet. Daniel set down the basket before she reached him, as though nothing on the estate could be more urgent than what she had to say. Sophie talked with both hands. Daniel glanced toward Dante, his face unreadable at this distance.

Vincent Russo appeared beside the terrace doors carrying a slim folder.

“You told me to bring the overnight reports.”

“I did.”

“There's a problem.”

Dante rose. “Which one?”

“Someone entered the main house after midnight using a maintenance credential that was canceled in May.”

“Who?”

“On paper? A contractor named Owen Price. In reality, that credential should have opened nothing.”

Dante followed Vincent inside. In the entrance hall, the staircase stood exactly as it always had: dark polished wood, pale marble, an arrangement of white lilies on the console beneath a portrait of Dante's grandfather. Nothing announced that a listening device had been fixed beneath the lower curve for months.

“Security cameras?” Dante asked.

“The west corridor recorded a blank interval of six minutes. I have an explanation from the technician, but I don't believe it.”

“Tell me what you believe.”

“Somebody with authority over the house is helping an outsider.”

In the study, Vincent spread photographs across the desk. One showed a narrow service entrance near the loading bay. Another showed the same door three minutes later, blurred by rain. A dark figure stood beneath the awning, holding a rectangular parcel.

“Nothing conclusive,” Vincent said. “But the package is the right size for the maintenance housings we had installed last spring.”

Dante studied the image. The figure wore a distinctive pale scarf.

“Who ordered the new housings?”

“Estate operations. The paperwork has Julian Mercer’s approval.”

Julian Mercer was the man Dante trusted to turn ugly transactions into polished explanations. At forty-two, he managed the Moretti group's property investments and charitable holdings. He had been educated in London, wore shoes that cost more than the gardener earned in a week, and never sat down until the owner of the room invited him. His reliability had become so familiar that Dante rarely examined it.

“Julian approves a thousand things a week,” Dante said.

“I know. That's why this matters less than the canceled credential. Someone reopened it.”

Dante looked again at the photograph. He could not see a face.

“Don't question Julian. Not yet.”

Vincent nodded, but his expression tightened.

“And don't question the child,” Dante added.

“I hadn't intended to.”

“I did. For about thirty seconds this morning. I asked her to watch the staircase without telling her father.”

Vincent stared at him.

“Then I told her not to.”

“That was fortunate.”

“It wasn't fortune. She asked a better question than I did.”

A knock interrupted them. Marco stepped inside holding a cream envelope that had been left with the morning mail. There was no return address. Dante opened it and found a single photograph: himself kneeling beside Sophie under the staircase. On the back, in block letters, someone had written, LITTLE DETECTIVES SHOULD STAY OUT OF BIG BUSINESS.

Vincent reached for the image. “When?”

“Yesterday,” Dante said. “Someone photographed us yesterday.”

Marco looked genuinely sick. “The perimeter cameras didn't show anyone outside the hall.”

“Then the photographer was already inside.”

The image should have frightened Dante only because of what it proved about his security. Instead he remembered Sophie's fingers working patiently beneath the wood and felt a cold, personal anger. The person who had been listening knew a child had discovered the device. The person wanted him to know it, too.

“Lock the service credentials,” he told Vincent. “Privately. Review everyone who had access. And tell Daniel Carter what's happened.”

“Everything?”

“Enough for him to make decisions about his daughter. He's her father. I don't get to overrule that because I own the house.”

Vincent gave him a brief, assessing glance, then collected the photographs.

Daniel arrived after lunch with soil still beneath his fingernails. He remained standing across from Dante's desk despite an invitation to sit.

“Vincent says someone has been watching the house,” he began.

“Yes.”

“And Sophie found something.”

“Yes.”

“Is she in danger?”

“I don't know. I won't lie to you.”

Daniel's hands closed around the back of the chair. “Then we should leave.”

Dante had expected that answer. It still landed harder than he liked.

“I can arrange somewhere secure until we know more.”

“I have a sister in Albany. I don't need you to arrange our lives.”

“Then go to Albany. The cottage remains yours until you decide what you want to do.”

Daniel studied him. “I took this job because the estate was supposed to be safe. We stayed in the village with my mother until her health failed, and Sophie moved into the cottage fourteen months ago. I thought the gates would keep the world out.”

“I'm sorry.”

The apology hung between them. Dante had been taught never to apologize when he could pay instead. It was a lesson Daniel clearly did not value.

“Sophie likes you,” Daniel said. “That's the problem. She thinks you're her friend.”

Dante looked at the returned silver button on his desk. “I hope I haven't taught her that friends are people who make her keep secrets.”

Daniel let go of the chair. He did not thank Dante. He did not forgive him. He simply said he would decide after speaking to his daughter and walked out.

By four that afternoon, Vincent had found two more anomalies. A maintenance invoice charged to the estate included a monthly service fee for something called a climate-monitoring relay. Nobody could locate the relay. A purchasing account had paid the invoice under the authority of someone named E. Bell, an employee whose personnel record ended eleven months earlier.

“Could be fraud,” Vincent said. “Could be an accounting error.”

“Not after a photograph of Sophie.”

Dante made one deliberate decision. He would allow whoever was listening to hear something worth repeating. He and Vincent stood at the bottom of the staircase, close enough to be overheard by any additional device, and discussed a fictional acquisition of the old Breakwater Terminal at a false price of eight million dollars.

Dante had no intention of buying it. The property was controlled by a city trust and would not be offered for sale. But a person who believed the Moretti group intended to make a bid might move money, issue instructions, or contact the real target.

They spoke for seven minutes. Neither used Sophie's name.

Afterward Dante walked out into the late afternoon garden. Daniel was closing the cottage shutters while Sophie stood near the steps with her detective notebook. A suitcase sat beside the door. She had traded her hat for a knitted cap shaped like a fox.

“Are you going on a case?” Dante asked from the path.

“We're visiting Aunt June,” Sophie said. “Daddy says we need some quiet.”

“Your father is right.”

“Are you keeping my badge?”

“Until I learn the rules.”

She nodded solemnly. Then she held out the notebook.

“Here. I forgot to tell you one clue.”

Dante took it without opening it. “You can tell me.”

“Yesterday, after I found the alien battery, a man said he was glad the cameras weren't working.”

Dante did not move.

“Which man?”

“The one with the bird tie. He was talking on his phone beside the greenhouse.”

“What did he look like?”

Sophie shrugged. “Grown-up. Brown hair. He smelled like oranges and gave Marta a new key.”

Daniel stepped between them, not aggressively, but with unmistakable purpose.

“That's enough questions,” he said.

“It is,” Dante agreed. He returned the notebook. “Thank you, Sophie.”

The girl waved as Daniel carried the suitcase toward his car. Dante waited until they were safely through the outer gate before calling Vincent.

“Find out who wore a tie with birds on it yesterday,” he said. “And who gave Marta a key.”

Vincent's answer came almost immediately.

“Julian Mercer wore a silk tie with blue cranes. I remember because he made a joke about it at breakfast.”

Dante watched the car disappear around the bend. His first instinct was to order men after Julian. Instead he looked down at the silver button in his palm and remembered what Sophie had said about bad detectives.

“You don't have enough to accuse him,” Vincent warned.

“No,” Dante replied. “But somebody does.”

At that same moment, Julian Mercer was sitting in his Manhattan office reading a message on an encrypted screen. The words were brief: THE CHILD IS GONE. THE FALSE PURCHASE IS CONFIRMED.

Julian's smile vanished when a second message appeared.