Detective Harry Ambrose investigates a chilling new homicide each season. He employs some unusual tactics and a deep capacity for empathy to solve his cases. His boundless dedication is driven by his dark past, leading him into powerful and often dangerously intimate bonds with his suspects. "The Sinner" is a blend of a thrilling murder investigation and raw character drama, creating an electrifying ride with standout performances. The series was originally adapted from the novel of the same name by Petra Hammesfahr; however, the book's darker outlook was toned down, and the location was shifted from Germany to Upstate New York.