Premiering in the United Kingdom on May 10. Rosalie Douglas (Julie Graham, The Bletchley Circle) is living in a fog of grief and denial following the death of her son. Her marriage is falling apart, her teenage daughter has gone off the rails, and Rosalie refuses to accept that his death was an accident. The family finds comfort when they meet a charismatic young man at bereavement counseling, but soon an insidious triangle begins to form.