Claire is a 38-year-old, affluent woman living in Dunwoody, Atlanta. As the youngest of the Carroll daughters, she grew up in the shadow of her sister Julia's unresolved disappearance, learning to cope by bottling her emotions and avoiding difficult truths. She relies entirely on her husband's income and defers to him for major decisions, maintaining a carefully curated life of luxury, tennis matches, and quiet compliance. Following a tragic alleyway mugging, she unearths highly disturbing video files on her husband's computer that shatter her comfortable existence.

Lydia is the middle Carroll daughter and a single mother who operates a successful dog grooming business. Following her sister Julia's disappearance, Lydia fell into vagrancy and addiction, though she now manages her sobriety with strict dedication. She harbors deep resentment toward her family because they dismissed her claims of sexual assault years ago. Despite her tough exterior and insecurities about her weight, she fiercely protects those she loves and refuses to run away from ugly realities.

Paul is Claire’s wealthy, punctilious husband and a highly successful architect. Having lost his parents in a freak car accident when he was young, he demands full authority over his household and obsesses over keeping his environment perfectly tidy. He maintains a polite, gentlemanly exterior that obscures a distinctly aggressive and controlling nature. His sudden stabbing during an alleyway robbery acts as the catalyst for the investigation into his deeply hidden digital life.

Julia is the eldest Carroll daughter, who vanished without a trace at nineteen years old while studying journalism at the University of Georgia. Described in memories as a beautiful, blonde teenager with a penchant for wearing metal bangles, she was bold, opinionated, and passionate about feminist public policy. Though physically absent, her unsolved disappearance remains the defining tragedy that fractured the Carroll family into isolated, grieving pieces.

Sam is the deceased patriarch of the Carroll family and a former veterinarian who identified strongly as a man of science. When Julia vanished, he transformed into a broken, hollow man consumed entirely by grief and his desperate attempts to investigate her case. He hoarded evidence, alienated his surviving family members, and eventually died by suicide just before the sixth anniversary of Julia's disappearance.

Helen is the matriarch of the Carroll family, a retired librarian who has since remarried. Following the trauma of Julia's presumed death and her husband's subsequent decline, she slipped into alcoholism and emotionally detached from her surviving daughters. She maintains a calm, sometimes abrasive demeanor, especially when interacting with law enforcement figures who failed her family decades prior.

Dee is Lydia’s teenage daughter, attending the prestigious Westerly Academy on a scholarship. She never knew her biological father and is raised primarily by Lydia and Rick. Named after her missing aunt, she bears a striking physical resemblance to Julia and harbors ambitions to become a veterinarian like her late grandfather. She represents a new generation mostly shielded from the immediate fallout of the Carroll family tragedy.

Rick is a mechanic and Lydia’s longtime, dedicated boyfriend. Having met Lydia in rehab, he understands her struggles intimately and provides a gentle, reliable anchor for both her and Dee. He is a blue-collar worker who patiently navigates Lydia's defensive moods and serves as a crucial emotional refuge for his small family.

Fred is an FBI agent assigned to investigate the burglary at the Scott residence. He mirrors the local police captain's trench-coat aesthetic but carries himself with a distinctly aggressive, untrustworthy energy. He sports a mysterious black eye and frequently crosses professional boundaries by flirting inappropriately while intensely scrutinizing suspects.

Captain Mayhew is the current head of the Dunwoody Police. He is an old-fashioned law enforcement officer who wears an untrimmed mustache and a classic trench coat, often seen chewing on a cigar. He habitually patronizes citizens, preferring to dismiss complicated evidence in favor of simple, less demanding theories.

Huckabee is the stereotypical small-town sheriff who originally led the investigation into Julia Carroll's disappearance. Wearing a Stetson hat, yellow-trimmed trousers, and anachronistic sideburns, his rigid incompetence earned him the mocking nickname "Huckleberry" from Helen. His failure to locate Julia remains a massive source of bitterness for the Carroll family.

Johnny is Paul’s uncle and a locally famous lawyer who transitioned into a career as a congressman. He leverages his extensive connections with law enforcement and local government to pull administrative strings, having heavily subsidized his nephew's architectural firm through lucrative government contracts.

Adam is Paul’s childhood friend and current partner at their successful architecture firm. Highly emotional and prone to anxiety, he maintains a complex history with Claire that blurs professional and personal boundaries. Following Paul's sudden death, Adam becomes intensely fixated on retrieving specific digital records from the Scott home.

Anna is a sixteen-year-old local girl who has recently gone missing under mysterious circumstances. Recognizable by her dark hair and described as a vulnerable, picture-perfect victim, her heavily publicized disappearance forces the community—and the Carroll family—to confront the haunting parallels to a decades-old cold case.

Ben is an incarcerated serial killer who was once floated as a suspect in Julia's disappearance. Seizing upon a rumor that Ben possesses information about his daughter, Sam visits him frequently. The two men develop a strange dynamic, passing the time by discussing movies and books through the prison glass.