Ep 1. Part 1

The Sinner is a psychological thriller that follows the story of a young mother named Cora Tannetti, portrayed by Jessica Biel, who commits a seemingly unprovoked act of violence at a public beach. The first episode of the series, titled "Part 1," opens with Cora's seemingly idyllic life as a wife and mother of a young son, and her dissatisfaction with her mundane routine.

As Cora heads to the beach with her family, her anxiety and discomfort become increasingly palpable, culminating in a shocking outburst of violence against a stranger on the sand. The man dies from his injuries, and Cora is taken into custody, where she struggles with what she has done and the reality of facing the consequences.

The show then follows Detective Harry Ambrose, played by Bill Pullman, as he begins his investigation into Cora's crime. He is intrigued by the reasons behind such a brutal act, as Cora has shown no prior history of violence or mental illness. As he delves deeper into her history and uncovers disturbing details about her past, he begins to piece together the events that led to the fateful day on the beach.

As the episode unfolds, the audience is given glimpses into Cora's troubled past, including flashbacks to her childhood and adolescence. It becomes clear that she has repressed traumatic memories and experiences, which have plagued her throughout her life and ultimately led to her inexplicable act of violence.

Throughout "Part 1," the tension and unease build as the investigation into Cora's case heats up. Detective Ambrose pursues her story with vigor, determined to uncover the truth behind her crime. Meanwhile, Cora is plagued by guilt and confusion, as she struggles to reconcile the person she knows herself to be with the violent actions she has taken.

Overall, "Part 1" sets the stage for the rest of The Sinner's first season, with a compelling and suspenseful opening episode that draws the viewer in and leaves them wanting more. With strong performances from its lead actors and a dark and twisted plot, this psychological thriller is sure to keep audiences on the edge of their seats.