Marcie is a successful family law attorney living in Hemingway Grove with her husband, David, and their two children. Previously a high-powered criminal defense lawyer in Chicago, she returned to her hometown seeking a quieter life after a traumatic case fifteen years ago. She is intelligent, fiercely protective of her family, and resourceful when facing unsettling disturbances at her home.

David is the owner of Hemingway's Pub and the husband of Marcie Bowers. He claims to have been orphaned at age four and raised in foster care. After saving a man's life and becoming a viral internet sensation, he begins exhibiting strange, secretive behaviors. He uses a burner phone and lies about his whereabouts, raising questions about his past.

Kyle is a police sergeant working in his hometown of Hemingway Grove. He takes his duty to protect the local community seriously. As Marcie's former high school boyfriend, he still harbors lingering feelings for her, which sometimes colors his professional judgment as he investigates the increasingly sinister occurrences targeting her family.

Agent Blair is a veteran FBI agent who focuses on organized crime. He remains heavily fixated on Michael Cagnina, a mob boss who evaded serious murder charges fifteen years earlier and only served time for tax evasion. Blair views Cagnina as a career-defining target and begins scrutinizing David's finances, suspecting money laundering connections.

Silas is a cold-blooded assassin who previously worked for the mob boss Michael Cagnina. Marcie represented him in a high-profile case fifteen years earlier, during which he hid his face using surgical alterations and voice-distorting technology. His sinister reputation and rumored death in a mass killing cast a long shadow over Marcie's past.

Lincoln is the ten-year-old son of Marcie and David Bowers. He experiences the direct impact of the threats against his family when an unknown person dressed in a costume hands him trick-or-treat candy containing a dead rat.

Grace is the twelve-year-old daughter of Marcie and David Bowers. She lives a comfortable life in Hemingway Grove until the sudden onset of unsettling events disrupts her home environment.

Camille is a pregnant woman living in Hemingway Grove who receives secret, disguised visits from David Bowers. She pressures David to tell his wife the truth about his situation, serving as a primary source of Marcie's early suspicions regarding infidelity.

Michael Cagnina is a notorious Chicago mobster. After the key witnesses set to testify against him were murdered, he avoided a life sentence and instead served sixteen years for tax evasion. His recent release from prison coincides with the disturbances in Hemingway Grove, raising fears of retaliation.

Howard is a senior partner at a Chicago law firm. He served as co-counsel alongside Marcie fifteen years ago when they defended the assassin Silas Renfrow. He functions as a link to Marcie's past legal career.

Darlene is a local resident of Hemingway Grove and a former sorority sister of Marcie. While she was never particularly close to Marcie, she observes the town's dynamics and speculates on why the ambitious attorney returned to the small community.

Diane is a client in Marcie's family law practice. She supported her husband through medical school only to be divorced once he became wealthy. Her experiences with her ex-husband's burner phone inadvertently fuel Marcie's suspicions about David.

Ginny is a police officer in Hemingway Grove. She acts as a first responder to local incidents, including the triggered house alarm at the Bowers's property, and coordinates information with her superiors.

Oliver is a retired FBI agent who previously worked on the Michael Cagnina investigation. He provides historical context regarding the ruthless nature of the assassins involved in the massacre fifteen years ago and the initial theories surrounding the missing witnesses.

Becky works in the criminal division of the IRS. As a former coworker of Agent Blair, she assists him by looking into the financial structuring and tax returns of David's business operations.

Lulu is the Bowers family dog. Her brief, unexplained disappearance from a secure yard serves as the first unsettling incident in a string of targeted disturbances at the family's residence.