At the center of the American thriller series "The Sinner" is detective Harry Ambrose, who skillfully investigates mysterious crimes. In broad daylight, a young mother and model wife, in front of her family members and a large number of strangers, stabs an unknown man with a knife. The woman herself is unable to explain what drove her to commit this monstrous crime. The plot of the second season is connected to a boy who lives in a religious commune and is accused of poisoning his parents.