The first installment of the close-ended series, "The Sinner" follows a young mother (Jessica Biel) who, when overcome by an inexplicable fit of rage, commits a startling act of violence and to her horror has no idea why. The event launches an inverted and utterly surprising crime thriller whose driving force is not the "who" or the "what" -- but the "why" -- as an investigator (Bill Pullman) finds himself obsessed with uncovering the woman's buried motive. Together they travel a harrowing journey into the depths of her psyche and the violent secrets hidden in her past.
New story in Season 2 lures Detective Harry Ambrose (Bill Pullman) back to his hometown in rural New York to assess an unsettling and heart wrenching crime -- parents murdered by their 11-year-old son, with no apparent motive. As Ambrose realizes there's nothing ordinary about the boy or where he came from, the investigation pulls him into the hidden darkness of his hometown. He's pitted against those who'll stop at nothing to protect its secrets -- and a mysterious woman who proves to be a complicated, enigmatic piece to this haunting puzzle.
The Sinner's third installment follows Detective Harry Ambrose (Bill Pullman) as he begins a routine investigation of a tragic car accident on the outskirts of Dorchester, in upstate New York. Ambrose uncovers a hidden crime that pulls him into the most dangerous and disturbing case of his career.
In Season 4, still reeling from the trauma of a previous case a year ago, the now-retired Harry Ambrose (Bill Pullman) travels to Hanover Island in Northern Maine for a recuperative getaway with his partner, Sonya (Jessica Hecht). When an unexpected tragedy occurs involving the daughter of a prominent island family, Ambrose is recruited to help the investigation, only to be thrown into a mystery of mounting paranoia that will turn this sleepy tourist island, and Ambrose's life, upside down.