 After a car accident on a bridge, the psychiatrist Sam Foster (Ewan McGregor) assumes the case of the survivor Henry Letham (Ryan Gosling), who apparently torched and car and promises to commit suicide three days later. Sam decides to investigate deeper what happened with Henry, and feels that he is becoming detached from reality with his findings about the case. He asks his girlfriend Lila Culpepper (Naomi Watts) to help himself to stay lucid, while trying to solve the intriguing situation of Henry.