THE MAFIA BOSS FIRED EVERY NANNY—UNTIL ONE WOMAN MADE HIS TWINS LAUGH AND EXPOSED THE SECRET THAT KILLED HIS WIFE

At 2:59 a.m., Nico's technician sent a recording of an empty nursery to the address that had been waiting for stolen footage. It was an old recording, made before the girls came home from the hospital. White curtains moved in the breeze. A wooden mobile turned over two vacant cribs. Anyone watching would see a peaceful room, with no clue that my daughters were asleep two floors away in a guest suite surrounded by trusted guards.

"How long until we know who receives it?" I asked.

"Maybe minutes," Nico said. "Maybe never. They're using layers of rented servers."

I hated waiting. Waiting had never saved anyone in my world. You confronted a problem, made a threat, or paid a price. But Serena had confronted someone and ended up on a highway with no functioning brakes. So I waited.

Elise sat on the opposite sofa, turning Gabriel's little key between her fingers. She had agreed to stay while the girls slept, but I could see the cost of being away from them. Every time a floorboard settled upstairs, her head lifted.

"You can check on them," I said.

"I know." She didn't move. "I don't want to be the person who runs away whenever something gets hard."

"Sometimes running is the smart thing."

"Did you ever do it?"

I thought of Serena's last phone call. She had asked me to come home early. I'd been in a meeting, arguing over shipping contracts I couldn't remember now. I'd told her we'd talk in the morning. There had been no morning for us.

"Not when I should have," I answered.

At three, the transmission went out. At three-oh-two, Nico's technician leaned forward.

"Someone opened it."

On the monitor, a map showed a signal moving through two virtual locations before terminating at a private network belonging to a legal consultancy on West Wacker Drive. Its registered owner was Victor Bellini, a smooth-faced attorney who handled contracts for Dominic's holding companies.

"Bellini," I said.

Nico's jaw tightened. "It's circumstantial. A compromised router can point anywhere."

"Then let's get something that doesn't."

I took Elise to Serena's study. We had avoided searching her private files without guidance, and I had been grateful for that excuse. Grief made me possessive of ordinary things. A scarf. A pen. A mug with chipped blue paint. It seemed monstrous that the evidence needed to find her killer might be hidden among them.

Elise stopped beside the desk. "You don't have to do this by yourself."

"I wasn't planning to."

We worked until dawn. There were grant records, architectural plans, holiday cards from women who had stayed at Mercy House, and a box of unmailed notes Serena had written for the twins. I couldn't bear to open the notes. Elise saw my expression and quietly set them aside.

Behind a stack of recipe books, we found Serena's tablet. Nico connected it to an offline computer and recovered a local audio file that had been deleted from the screen but remained in an old backup.

The file was labeled FOR L.

I pressed play.

My wife breathed once, shakily, before speaking.

"Luca, if you're hearing this, I was too frightened to tell you while I could still look you in the eye. I'm sorry. I know how it sounds, but you need to listen to me all the way through."

My hand went numb.

Elise sat perfectly still. Even Nico looked away.

"I didn't believe Gabriel Navarro when he first contacted the foundation. I thought he'd found a bookkeeping error. Then I saw the vendor contracts. The same workers were being paid to rebuild places that had never been damaged. The companies listed on the invoices shared a single address. I confronted Dominic about it. He told me to stop embarrassing myself and let the men handle business."

I shut my eyes. It was her voice—bright around the edges, even when she was afraid. I'd spent so many nights trying to remember its exact sound that hearing it again felt like falling through ice.

"Gabriel believed the payments were part of a larger operation. He had evidence of illegal cash transfers hidden inside the foundation's legitimate accounts. I think he died because he refused to sign off on them. And I think Dominic knows who set the fire."

There was a long pause. A baby cried faintly in the background. Serena must have recorded the message while one of the twins slept nearby.

"If anything happens to me, don't go after him with a gun. He wants you angry. He knows how to make anger look like guilt. Find the original ledgers and give them to someone who can make the truth public. Gabriel gave me a way to reach them, but he hid the location inside an old children's song. I kept a copy of his instructions separate from the books. Remember the sunflowers, Luca. You always said they were ridiculous."

She gave a broken little laugh.

"Please take care of the girls. Let them know I wanted to stay. And if you ever find happiness again, don't apologize to me for it. Just promise you'll keep them safe."

The recording ended.

I didn't realize I was crying until Elise put a box of tissues beside my hand. She neither touched me nor spoke. That restraint was a kindness I would remember for the rest of my life.

"She knew," I whispered. "She knew she was in danger."

"She was trying to protect you," Elise said.

"I failed her."

"You didn't cut the brakes."

"I made sure she was surrounded by people I trusted."

"Then the person who betrayed that trust is responsible."

I wanted to believe the distinction. I wasn't ready. But I kept listening when she said, "We can do something for her now."

Nico found a handwritten line in one of Serena's notebooks, repeating the last three notes of the music box melody as numbers: 3-1-7. Below the numbers was the word ASTER, circled twice.

Aster Community Bank. A small downtown institution that had operated a private safe-deposit vault for generations. Gabriel had once used it for his grandparents' estate papers, according to Elise. The bank was due to close its original building at the end of the month.

We had a likely destination for the key.

"If Gabriel hid the ledgers there," Elise said, "we can finally prove he was telling the truth."

The words should have relieved me. Instead, I thought of what Serena had warned: Dominic wanted me angry. I had spent my life being easy to manipulate through my anger. If he was behind this, I couldn't afford to give him another opportunity.

We listened to the recording a second time, not because we needed more proof of Serena's voice, but because I could not bear to turn it off. On the second listening, I noticed how she paused when a baby made a noise and how her voice warmed when she spoke about the girls. She had been frightened enough to record a warning and still distracted enough to love the ordinary interruption of a child waking nearby.

"Gabriel sounded like that when he was trying not to worry me," Elise said. "He'd call from work and ask what I wanted for dinner, and only afterward would I learn something terrible had happened that day."

"You must miss him."

She smiled painfully. "I miss the stupid things most. The way he'd leave dishes in the sink after telling me to clean up. The way he'd sing the wrong words to every song in the car. I was so angry when he died that I thought anger might keep him close."

"Did it?"

"No. It just made everything else harder to see."

I wanted to tell her that anger had been my only reliable companion since the funeral. Instead, I asked her to describe one of Gabriel's terrible songs, and for a few minutes we spoke about a man who had lived, not only a man who had died.

At eight, I called Detective Mara Foster, a Chicago police investigator Serena had once praised for helping Mercy House residents testify against abusive partners. Foster arrived alone, reviewed the audio, and listened as Nico explained the security breach.

"Preserve everything exactly as it is," she said. "Don't edit the files. I'll seek a warrant and talk to the financial-crimes unit."

"I can get into that bank faster than you can get a judge," I said.

"And I can make sure the evidence survives a courtroom," she replied. "Do you want revenge, Mr. Caruso, or do you want the truth to remain true after the headlines fade?"

I glanced at Elise. She had asked me a different version of the same question every day without saying it aloud.

"I want my daughters to grow up knowing who their mother was," I said.

Foster nodded. "Then let us do this carefully."

After she left, Elise and I went to the guest suite. Rosie was awake, waving a fist at the ceiling. Maisie slept with one cheek pressed into her tiny hand.

Elise paused beside Serena's old photograph on the dresser. "She sounded brave."

"She was," I said. "Even when I couldn't see it."

My phone lit up before I could say more. Unknown number. A photograph appeared on the screen: Elise standing at the nursery window, taken that morning from somewhere inside the property.