Tom is a grieving widower and novelist suffering from writer's block following the sudden death of his wife, Rebecca. He recently purchased a slightly sinister-looking house in the rural English town of Featherbank to give his six-year-old son, Jake, a fresh start. He worries constantly about his parenting abilities, his son's social isolation, and his own childhood memories of an absentee father.

Pete is a veteran police detective and recovering alcoholic. His career stalled due to the intense psychological trauma he experienced while investigating the Whisper Man serial killer case twenty years ago. He lives a highly regimented life, substituting alcohol with rigid physical and administrative routines, and spends his free time searching the countryside for the remains of a victim whose body was never found.

Jake is Tom's six-year-old son, a quiet and imaginative boy who carries a "Packet of Special Things" everywhere he goes. Deeply affected by the trauma of finding his mother after she passed away, he struggles to fit in at his new school in Featherbank. He relies on a shifting cast of imaginary friends for comfort and routinely draws protective barriers in his sketchbooks.

Amanda is a dedicated, relatively inexperienced detective leading the investigation into the disappearance of young Neil Spencer. She strives to perform her duties exactly by the book and hopes to rise through the police ranks. She relies on Pete Willis's historical expertise while simultaneously worrying about the toll such grim work takes on her own mental health.

Frank Carter is a notorious serial killer known as the Whisper Man, who was captured twenty years ago for the abduction and murder of several children in Featherbank. He is an imposing, manipulative man who thrives on his dark legacy within the prison system. He explicitly uses his knowledge regarding undiscovered evidence to maintain psychological power over the police.

Francis is the son of convicted serial killer Frank Carter. He grew up in a profoundly abusive environment, witnessing his father's horrific crimes firsthand before being placed into protective custody and given a new identity twenty years ago. He carries immense psychological trauma from his childhood and struggles to reconcile the horrors he survived with his twisted upbringing.

Norman is a short, bald man with a macabre fascination with violent crimes. He maintains a disturbing private collection of artifacts related to famous murders, treating them like museum pieces. His morbid hobbies and persistent trespassing around the "scary house" in Featherbank quickly draw the attention of local law enforcement.

Karen is a friendly, observant local resident and a fellow parent at Jake's new school. She strikes up a casual friendship with Tom during school drop-offs and pick-ups. She offers him a sympathetic ear regarding his struggles with single parenthood, though her career as a local journalist gives her a professional interest in the town's darker happenings.

Rebecca is Tom's deceased wife and Jake's mother. She passed away suddenly from a heart attack prior to the events of the story. She grew up in Featherbank, and her absence leaves a massive emotional void that drives much of her family's current struggle to function.

Colin is the Chief Inspector overseeing the local police department in the region. He relies on Amanda Beck to lead the current, high-profile investigations and harbors doubts about Pete Willis's drive, though he respects the veteran detective's historical knowledge of local serial killers.

Neil is a young, neglected boy living in Featherbank whose parents suffer from severe alcoholism, leaving him to largely fend for himself. His sudden disappearance on a July evening sparks a massive police manhunt and reawakens the town's dormant fears regarding child abductions.

Tony is the fifth and final confirmed victim of the original Whisper Man killings twenty years ago. Unlike the other boys taken by Frank Carter, his body was never recovered, a fact that torments the investigating detectives and fuels the persistent, dark urban legends circulating in Featherbank.

Victor is an inmate and the closest prison associate of serial killer Frank Carter, who even served as Victor's best man during a prison wedding. He operates as an intermediary for people interested in the dark legacy of the Whisper Man, facilitating connections and taking payment from morbid crime enthusiasts on the outside.

Mrs. Shearing is the former owner of the spooky house Tom Kennedy purchases. She lived in the house as a child before renting it out to a series of highly problematic and sketchy tenants over the years. She ultimately chose to sell the property to Tom and Jake because they seemed like a quiet, respectable family.

Dominic is a former tenant of the house Tom Kennedy purchases in Featherbank. He was involved in illegal dealings and met a violent end when his murdered body was discovered in the woods. His residency connects to the house's sinister local reputation and an underground economy of crime enthusiasts.

Sally is Pete Willis's ex-wife. Her memory serves as a painful but highly effective anchor for Pete in his daily, solitary struggle against alcoholism. He views his past failures during their marriage as a constant reminder of the cost of his addiction.

Officer John Dyson is a local policeman assisting Detective Beck with neighborhood inquiries and crime scene containment. He initially downplays Tom Kennedy's concerns about a late-night prowler before physical evidence elevates the severity of the case.

Owen is a classmate of Jake's at Rose Terrace Primary School. He is hostile and mocking, frequently bullying Jake about his quiet nature and targeting him with incredibly cruel comments regarding the town's missing children.