Nancy Rosenberg had spent most of her life believing that peace was something a person could create.
Not find.
Not hope for.
Create.
She had created it in her classrooms when she was still teaching. She had created it in her marriage, in the routines she and Harold followed for more than three decades, and even in the little things that other people considered insignificant: the exact position of the chairs around the dining table, the hour at which the curtains were opened each morning, the day of the week when groceries were purchased.
For thirty-two years, she and Harold had lived in a quiet detached house outside Evanston.
There had been trees behind their property, a long driveway, and enough distance between neighboring houses that Nancy could stand in her kitchen without hearing anyone else's television.
She loved that silence.
Then everything changed.
Harold suffered a mild stroke.
He survived, but survival was not the same thing as returning to normal.
His right side became weaker. He moved more slowly. Stairs became something to fear. A trip to the backyard, once effortless, could leave him exhausted.
Nancy became his caretaker almost overnight.
Their daughter tried to help.
"You don't have to do everything yourselves," she told them.
Nancy always answered the same way.
"We're managing."
But they weren't.
Eventually, they sold their old home and moved to Hawthorne Ridge, a carefully maintained residential community where landscaping, snow removal, and exterior maintenance were handled according to association rules.
Nancy loved the idea immediately.
Rules meant predictability.
Predictability meant safety.
Harold, however, saw things differently.
"You've finally found a neighborhood where they have paperwork for everything," he joked when they signed the documents.
Nancy smiled.
"I like paperwork."
"I know you do."
For the first few weeks, Hawthorne Ridge seemed perfect.
Then Nancy discovered Unit 58.
The home belonged to Elena Martinez.
Elena was forty-six, a physical therapist, and the mother of a sixteen-year-old daughter named Maya. Elena also cared for her elderly mother, Sofia, who lived with them.
Their patio sat beneath an enormous maple tree.
Beautiful in summer.
A nightmare in autumn.
Every windy afternoon, leaves covered the stone patio and collected near the back steps. Because Sofia walked with a cane, Elena worried about her slipping.
So Elena bought a battery-powered leaf blower.
The machine was not particularly large.
It was not operated for hours.
Usually, Elena used it for ten or fifteen minutes.
But Nancy heard every second.
The first time, she looked up from her book.
The second time, she closed the window.
The third time, she began timing it.
Harold noticed.
"What are you doing?"
"Nothing."
"You've been staring at that clock for ten minutes."
"I'm just keeping track."
"Of the weather?"
"Of the noise."
Harold looked toward the patio.
Then he smiled.
"Ah."
Nancy frowned.
"What's funny?"
"Nothing."
"Harold."
"You've found your next project."
Nancy didn't answer.
The following afternoon, she walked outside.
Elena was clearing leaves.
"Excuse me," Nancy called.
Elena turned the machine off.
"Yes?"
"I'm Nancy. From Unit 57."
"I know. We've met."
"I wanted to mention the blower."
Elena immediately looked concerned.
"Oh. Is it too loud?"
"Yes."
"I'm sorry. I can finish quickly."
"You've been using it repeatedly."
Elena glanced at the maple tree.