THE MAFIA BOSS WATCHED HIS FIANCÉE MOCK A MAID WITH A SWOLLEN ANKLE—BUT WHEN HE DISCOVERED WHAT SHE HAD STOLEN FROM HIS MOTHER'S PIANO, EVERYTHING CHANGED.

I reached the urgent-care clinic just after midnight. The X-ray showed no fracture, but the doctor confirmed a significant ankle sprain and told me to use crutches, rest, and return if the swelling or pain worsened. By the time I emerged with a prescription for anti-inflammatory medication and a small folder of instructions, a car was waiting under the streetlight.

Marco stood beside it.

"Mr. Moretti asked me to make sure you got home," he said.

"I can call a cab."

"You can. But the ride is already arranged, and it doesn't come out of your pay."

I almost said no out of habit. Then I looked at my injured ankle and climbed in.

The city slid past in bands of sodium light. Chicago was quiet in the peculiar way it became after a storm, although there had been no rain. I kept seeing Vanessa's comb, its six bright pieces of ivory set against her dark hair, and Richard withdrawing the seventh from his pocket. My mother had repaired worn keys in church basements all my childhood. She knew that a broken instrument could be fixed. I didn't know whether a broken family could.

My mother was waiting in the kitchen of our two-bedroom apartment when I arrived. Ruth Sullivan's fingers were curled around a mug of cooling tea. The arthritis had made her hands swollen, but she reached for me immediately.

"Emma. What happened?"

I told her the simple part first: a piano wheel, a swollen ankle, a doctor. She watched my face.

"And the part you're leaving out?"

I sat at our small table and told her about the bat.

Her eyes widened at the mention of the Moretti grand piano. She had known the instrument from photographs. I had shown her the music room in the mansion when I first got the job, proud that my work had put me near something so beautiful.

"You smashed an eighty-year-old piano?" she asked.

"The cover. Not the soundboard."

"That does not sound as reassuring as you think it does."

"I know."

She listened while I explained the missing keys, the comb, the bench, and the name written on the seventh keytop. She was quiet for so long afterward that I worried she was angry.

"Maria Alvarez," she said at last. "I knew that name. She used to bring students to the neighborhood recital at St. Agnes. A wonderful teacher. She wasn't paid much, but she always found a way to buy sheet music for children who couldn't afford it."

"Do you know where she went?"

"Not after the Moretti woman died. I heard she'd moved to a smaller church on the South Side. That was years ago." Ruth shook her head. "Why would Elena hide her name inside a piano key?"

"That's what Luca wants to know."

My mother studied me. "Careful, Em. You can tell the truth without becoming responsible for a rich man's entire past."

I tucked that sentence away.

The next morning my phone rang at nine. I expected a supervisor to tell me I'd been dismissed. Instead it was Luca.

"Your medical visit is covered," he said. "Marco has arranged it. You are on paid leave while you recover."

"I destroyed your piano, sir."

"You did. We'll address the damage after we've dealt with the fact that you were injured trying to stop an unauthorized removal."

I heard paper moving on his end of the line.

"I won't ask you to come in today," he continued. "But there is something you should hear. My lawyer found Isabella's signature on documents dated five years after she vanished."

I closed my eyes. "Could she have signed them later?"

"Possibly. That's why we're investigating. I don't know what happened to her. I was told she drowned, but no body was recovered. My father handled everything."

He spoke with effort, as though he had been holding a door shut against that sentence for nearly two decades.

"I spent years trying to find her," he said. "Then my father told me I had to stop. He said all I was doing was making Mom's death worse."

I did not offer him comfort I hadn't earned the right to give. I asked whether the documents had been verified.

"Not yet. My attorney is obtaining certified copies."

"Then maybe there is still something to learn."

He was silent for a moment. "Yes. Maybe there is."

Luca's lawyer, Evelyn Cho, came to the estate that afternoon. I didn't attend. Marco later delivered a written account of what I'd witnessed so I could correct it before signing, and only after my ankle had been settled on a pillow did I read it carefully. He had written that a mover struck me with the transport wheel. I crossed out struck and replaced it with: The wheel hit my ankle while the piano was being moved; I could not tell whether the mover intended it.

That distinction mattered to me. I knew what Richard had said and what Vanessa had ordered. I wouldn't claim to know somebody else's mind.

Later, Ms. Cho called me herself and asked a narrow question.

"Did you personally see Mr. Bellini take the ivory from the bench?"

"No. Daniel said he did. I saw Mr. Bellini produce it."

"Thank you," she said. "That is exactly the distinction we need."

She explained, in terms I could understand, that Elena Moretti had established a charitable music trust for local children shortly before her death. The trust was supposed to own a modest old building in Pilsen where a youth music program called Riverlight had operated for decades. A separate portion of Elena's estate had been set aside for Isabella.

After Elena died, there were amendments. Some bore Isabella's signature, even though Isabella had been sixteen when she disappeared. Other papers transferred the Riverlight property into a company whose ownership was not immediately clear.

"A trust isn't a treasure chest," Ms. Cho said. "It has rules, beneficiaries, trustees, and records. We're examining whether anyone exceeded their authority."

"And if the signatures are real?"

"Then we still need to know whether the transactions were lawful and voluntary. We don't begin with a conclusion."

I appreciated that more than she knew.

By late afternoon, a message arrived from Daniel Voss. I hadn't given him my number. He had asked Marco to forward it, explaining that he wanted his own account recorded before anyone changed the work order.

He had attached a photograph. It showed the moving sheet signed by Vanessa Bellini at 3:42 p.m. Beside the words piano and bench were the instructions: REMOVE BEFORE FINAL TOAST. DO NOT OPEN IN FRONT OF HOUSEHOLD.

The document was ugly in its ordinariness. There was no dramatic confession. Just a line typed by someone who expected the command to be obeyed.

I spent the evening resting with my mother, listening to the radiator tick. She brought out an old binder of music-repair invoices, searching for any mention of Maria Alvarez. On the third page of the oldest section, she stopped.

"Look."

The invoice was from seventeen years earlier. Ruth had serviced a piano at St. Agnes during a student fundraiser. Under the list of repairs, someone had written in blue ink: Elena M.—Riverlight Scholarship Night—ask Maria about the new building.

My mother touched the page with one crooked finger.

"I remember that night now," she said. "Elena Moretti wasn't what people expected. She sat with children who had never touched a concert piano and asked what songs they wanted to play. Maria said they were working on something that would outlast any one donor."

"The Riverlight trust."

"Maybe. I don't know. But Maria can tell you."

I called Luca, then regretted the hour. He answered immediately.

When I told him about the invoice, I heard him draw in a breath.

"My mother never told me about Riverlight," he said.

"Maybe she wanted you to find out when you were ready."

"Or maybe I wasn't listening."

His answer stayed with me.

He asked whether he could send a driver for my mother and me if Maria agreed to meet. I said I would first ask Ruth whether she wished to come, and Maria whether she wanted visitors. Luca accepted that without argument.

Before we hung up, I asked a question that had been troubling me since the night before.

"Mr. Moretti, why did Vanessa have access to your mother's papers?"

He took a moment before answering.

"Because I gave it to her. We were preparing to marry. I thought trusting her meant not questioning her."

"Those aren't the same thing," I said, surprised by my own boldness.

"No," he replied. "They aren't."

The next morning, Ms. Cho sent word that her investigators had located a company named Bellini Redevelopment Holdings as the current claimant to the Riverlight building. Richard Bellini was one of its directors. The company had a hearing scheduled to approve a sale of the property the following week.

Luca called again. His voice was controlled, but I could hear exhaustion behind it.

"The seventh key wasn't about jewelry," he said. "It was a direction to the only person who might know what my mother intended."

I looked at Ruth's invoice and thought of the children who had played on that church piano, hoping music might open a door the world kept closed.

"Then call Maria," I said.

"We have. She refuses to speak to a Moretti."

He paused.

"But she asked one question before she hung up."