A windowless shack in the woods. Lena's life and that of her two children follows the rules set by their captor, the father: Meals, bathroom visits, study time are strictly scheduled and meticulously observed. He protects his family from the dangers lurking in the outside world and makes sure that his children will always have a mother to look after them. One day Lena manages to flee - but the nightmare continues. "Gone Girl" meets "Room" in this page-turning thriller.