I was certain I had uncovered my neighbor’s wife’s secret. Then she told me the man was her husband’s supposedly lost twin. That’s when the real mystery began.

Then he walked out.

That afternoon, Michael contacted me.

We met in a quiet park.

When I saw him in person, I couldn’t tell whether I was looking at Mark.

Michael handed me a folder.

Inside were photographs.

Bank records.

Property documents.

And several recordings.

“You wanted to know the truth,” he said.

I opened the first file.

My neighbor, Mr. Lewis, appeared on video.

He looked frightened.

He said:

“Mark knows what happened twelve years ago. He knows Michael didn’t start the fire.”

I looked up.

Michael was watching me.

“What happened?”

Michael swallowed.

“Mark started it.”

My heart sank.

Then he said the sentence that changed everything.

“But I didn’t come back for revenge.”

“Why did you come back?”

“Because Mark is planning to do it again.”

I stared at him.

“Do what?”

“Kill someone.”

“Who?”

He looked directly into my eyes.

“His wife.”

I couldn’t breathe.