Patricia is a 39-year-old former nurse turned stay-at-home mother living in the affluent, traditional Old Village neighborhood of Mt. Pleasant, South Carolina. She spends her days caring for her husband, two children, and ailing mother-in-law, often neglecting her own needs. Seeking connection and intellectual stimulation, she joins a local book club that reads true crime and mystery novels. She possesses a sharp intuition and a deep-seated desire to protect her community from harm.

James is a handsome stranger who moves into his deceased great-aunt's home in the Old Village. He claims to be a land developer from Montana working on a gated community project called Gracious Cay. He uses his charisma to quickly integrate himself into the neighborhood's affluent social circles, gaining the trust of local husbands and securing financial investments. He operates with a predatory nature hidden behind polite Southern gentility.

Carter is Patricia's husband and a psychiatrist pursuing a promotion to Chief of Psychiatry. He serves as the primary breadwinner for the family and expects a perfectly managed household in return. He frequently dismisses his wife's concerns, preferring to prescribe medication or minimize her worries rather than address underlying domestic issues.

Korey is Patricia and Carter's teenage daughter. She is a popular, athletic high school student who navigates the typical challenges of adolescence in a wealthy Southern suburb. As she grows older, she becomes increasingly withdrawn and exhausted, spending more time isolated in her bedroom.

Blue is Patricia and Carter's son. He is an intelligent but fearful boy who struggles to understand his grandmother's dementia-induced outbursts. He reacts to domestic instability by developing a morbid fascination with dark historical subjects, specifically consuming media and statistics about World War II.

Slick is a devoutly Christian housewife who insists the book club be referred to as a Bible Study group to secure her husband's approval. She weighs every decision against her religious beliefs and values her community standing. She demonstrates intense loyalty to her friends during periods of crisis.

Grace is a meticulously organized, rule-abiding Southern housewife who perfectly maintains her home. She possesses a highly observant nature and keeps a notebook documenting the license plate numbers of unfamiliar vehicles in the neighborhood. She firmly believes in maintaining the established social order and fulfilling her traditional duties.

Kitty is an artsy, fun-loving woman who defies the typical Southern housewife mold by wearing baggy sweaters, smoking cigarettes, and drinking. She initiates the new reading group with Maryellen because she genuinely wants to read engaging material. She acts as a grounded, practical presence among the women.

Maryellen is a Northern transplant adjusting to the cultural expectations of the suburban South. She adopts local habits, such as bringing baked goods to new neighbors as a socially acceptable way to gather information about them. She works for a local funeral home and carries quiet stress regarding her husband's career history.

Miss Mary is Carter's mother, a former schoolteacher who now suffers from advanced dementia. Once an intelligent and capable woman who knew the entire periodic table by heart, she now experiences unpredictable, sometimes violent outbursts. She harbors old memories of a historical tragedy involving a man named Hoyt Pickens and tries to warn her family about lingering dangers.

Mrs. Greene is a resilient Black woman who resides in Six Mile, a historically Black neighborhood in Mt. Pleasant. She works as a caretaker in the Old Village to support her family, eventually sending her teenage sons to live with her sister for their protection. She serves as a vital bridge between the affluent white community and the marginalized residents of Six Mile.

Mrs. Savage is an uptight, elderly resident of the Old Village known for patrolling the neighborhood in a floppy canvas hat. She maintains a perfectly manicured lawn and a pristine house, often annoying her neighbors with her strict standards. She experiences a sudden, rabid behavioral shift that results in a violent altercation.

Francine is an elderly Black woman who works as a house cleaner for Mrs. Savage. She is known in the neighborhood for her vinegary nature, which limits her employment opportunities in the affluent Old Village. She suddenly goes missing from the community.

Destiny is a nine-year-old girl living in a trailer in the Six Mile neighborhood with her mother. She experiences sudden bouts of extreme lethargy, spending her days sleeping with twigs tangled in her hair from wandering into the woods.

Wanda is a single mother raising her daughter Destiny in the Six Mile neighborhood. She faces intense scrutiny from local law enforcement, who suspect her of child abuse rather than investigating the true cause of her daughter's physical decline.

Hoyt Pickens is a historical figure from Miss Mary's youth who went into the bootlegging business with her father. He is remembered as a man in an ice cream suit who bankrupted her family and incited a mob against a local Black man during a string of child disappearances decades ago.

Leon Mills is a Black veteran from Mt. Pleasant's past who suffered a head injury during the war. He became the scapegoat for a series of missing children and was brutally lynched by the townspeople.