1 | The Slap Heard Through the Glass My name is Elena Marsh, and for a long time I told the story of that night as if I were the villain of it.

She put her finger on the date.

She said, “Elena, look at this.”

I looked.

She said, “It’s Saturday.

This Saturday.”

I said, “That’s two days from now.”

She said, “I know.”

The phone on the table lit up again, and this time both of us saw the preview at the same time, and neither one of us looked away.

It said, “Everything is ready for Saturday.

Don’t tell anyone.”

And then, right underneath it, before I could reach for the phone, one more message came through, from the same number, and the preview only showed four words.

It said, “She knows too much.”

3 | The Woman in White Rings My Doorbell
I did not sleep that Friday night.

I sat in my apartment on East 74th Street with the beaded clutch still on my kitchen counter, and I kept telling myself the same thing over and over: the woman in the white dress was the enemy.

Then, at 9:40 the next morning, my doorman, Sal, called up and said a young blonde woman was asking for me by name.

I told him to send her up because I wanted to say something to her face.

When I opened the door, I was ready to slam it again.

But she was already crying, and the moment I saw her up close I understood something was wrong with the picture I had built in my head.

She was not wearing white.

She was wearing a gray hoodie and jeans, and her hands were shaking around a manila envelope.

“You’re Elena,” she said.

“Who are you?”

I asked.

“Claire Bennett,” she said.

“I’m a nurse.

I work at a children’s hospital in Newark.

And I think your fiancé has been lying to both of us.”

I let her in because I didn’t know what else to do with her, and I made her sit on the couch because she looked like she might fall over.

She set the envelope on my coffee table and looked at the beaded clutch next to it.

“That’s mine,” she said quietly.

“I left it on the entry table by accident.

I bought it for the party.”

So that was the first lie I had been living inside: that the clutch was a thing I stole from Richard.

It was hers the whole time.

I opened it and gave it back to her, and she held it against her chest like it was a pet she thought she had lost.

Then she told me the story I could not have imagined in a hundred years.

“Richard told me he was divorced,” Claire said.

“He told me in October.

He told me the divorce was finalized last spring.”

“He told me he was single when we met,” I said.

“He told me you were his business partner,” she said.

“He said you had trouble letting go.

He said I shouldn’t call him while you were around because it made the paperwork harder.”

I sat down on the other end of the couch because my legs decided to make the decision for me.

That word, paperwork, was the first thing that made my skin go cold.

She opened the envelope and slid everything across the table.

First was a deed to a condo in Brooklyn — two bedrooms, Fort Greene, in her name.

Second was a life insurance policy with her listed as the beneficiary.

Third was a folded pen-and-ink note in Richard’s handwriting, the same handwriting I had stared at in the black coat pocket two weeks earlier.

“He told me we were going to fill out the mortgage papers after the wedding,” she said.

“He told me not to tell anyone about the ceremony because his mother is sick and he didn’t want her to be upset.”

I finally understood that the wedding I saw on the invitation was real.

Claire just took a long breath and pulled out her phone.

“Listen,” she said.

“I want you to hear this before anything else happens today.”

She played me a voicemail, and it was his voice, calm and warm, the voice he used when he was trying to get my mother to co-sign for me in college.

“Everything is set for Saturday,” the recording said.

“Don’t bring anyone.

Don’t tell anyone.

After the ceremony, I’ll explain everything to Elena.”

Claire stopped the recording and set the phone face down on the table between us.

“I don’t know what he’s planning,” she said.

“But I know I’m not the only one he’s planning it with.”

And in my head the number on the invitation — Saturday — moved from future tense into a countdown.

I looked at Claire Bennett, twenty-nine years old, from New Jersey, a stranger who had just walked through my door and become the only person in the world who understood the exact shape of the mess I was standing inside.

“Do you want to help me find out?”

I asked her.

And she said, “Yes,” without one second of hesitation.

4 | The Balloon Payment
I called Nora before I called anyone else because Nora was the only person I knew who could hear the words my fiancé and not immediately start crying.

Nora came to my apartment Saturday afternoon with her briefcase, and she sat down at my dining table across from Claire and me and asked me to start at the beginning.

I told her the invitation, the phone, the voicemail.

Nora listened and then asked Claire one question.

“Did you sign anything for him?”

Claire said yes.

A loan application, a condo deed, and a health insurance form, all of them with the words nothing binding stamped on top.

Nora wrote three words on her legal pad: what is he buying.

She left to make two phone calls and was gone for almost an hour.

When she came back, her face had changed.

She sat down slowly, the way people sit down when they are about to say something they have said before and hated saying.