Olivia works from home as a copy editor and tries to instill strict rules in her family. When she discovers her son breaking into houses, she writes anonymous apology letters to the victims, causing widespread panic on her street. She hates keeping secrets but finds herself lying to protect her child from the police.

Amanda is a young woman who moved to Aylesford a year ago. She flirts openly at neighborhood yard parties, drawing the attention of local husbands and annoying their wives. Her sudden disappearance forces the police to question her neighbors and exposes a network of neighborhood affairs.

Raleigh is a sixteen-year-old high school student who picks locks to enter his neighbors' empty houses. He uses a USB drive to bypass their computer passwords and read their private emails. He considers this a harmless hobby until the police discover his fingerprints inside a crime scene.

Glenda is Olivia's closest friend of sixteen years. She works part-time and spends her evenings managing her sixteen-year-old son, who regularly comes home intoxicated. She offers a sympathetic ear to Olivia's problems while aggressively hiding her own family's struggles from public view.

Robert is a lawyer who recently moved to Aylesford with his young wife. When she goes missing, he tells police they have a perfect marriage, despite knowing about her secret prepaid cell phone. He acts like a concerned husband in public while quietly resenting her actions.

Paul is a pharmaceutical executive who values his family's social standing. When he learns about Raleigh's illegal computer hacking, he hires an expensive lawyer and forbids his son from apologizing to the victims. He frequently argues with Olivia over how to discipline the boy.

Carmine is a widow who recently moved into a house by herself. When she finds an anonymous apology letter slipped through her mail slot, she begins walking around the neighborhood to question the local teenagers. She refuses to drop the issue, bringing unwanted attention to the street.

Becky lives in the house directly behind Robert and Amanda. With her twin sons away at college and her husband traveling for business, she spends her time watching the neighbors from her backyard. She develops a strong infatuation with Robert and speaks to him over the fence.

Larry is a businessman who travels frequently for conferences. He previously caught Paul's attention during an awkward encounter with Amanda at the office. He gives the police vague answers about his whereabouts during the weekend of Amanda's disappearance.

Keith is Glenda's husband and frequently attends dinner parties at the Sharpe house. He leaves the child-rearing responsibilities entirely to his wife, remaining completely oblivious when his son stumbles down the street carrying a broken hockey stick.

Adam is a former athlete who now struggles with alcohol. He wanders the neighborhood streets late at night and causes severe stress for his mother. He has drifted apart from his childhood friend, Raleigh.

Webb is a local detective assigned to investigate a submerged car. He questions the residents of Aylesford, tracking down security camera footage to break the suspects' weak alibis.

Moen is Webb's partner. He assists in questioning the defensive husbands of Aylesford and cataloging physical evidence from the crime scenes.

Zoe lives next door to Carmine. She attends the local book club and eagerly spreads the news about Carmine's anonymous apology letter to the rest of the women.

Emilio is a defense attorney hired by Paul Sharpe. He instructs the Sharpe family to conceal Raleigh's trespassing, warning them about the financial costs of a civil lawsuit.

Jeanette lives across the street from the Pierce house. She reports late-night foot traffic to the detectives, helping them establish timelines.