Telling the story of a famous writer Marcel Bellmer (Benoît Poelvoorde) and his wife Jeanne (Mélanie Doutey), it follows their arrival at a colossal old country manor belonging to Jeanne’s family. As he settles into his late father-in-law’s office, Marcel hopes to overcome his problem of writer’s block and compose a worthy follow-up to his beloved hit novel Inexorable. Soon a mysterious, young woman Gloria (Alba Gaïa Bellugi) appears at their house. An oddball from the start, Gloria, at first charms the Bellmers with her personality, artistic flair, and independence, however it’s apparent to the audience that there’s more going on with Gloria than meets the eye. She quickly forms a bond with Marcel and Jeanne’s daughter Lucie, helping her with the family dog and starts living with them. As the story unfolds, it is revealed that Gloria is full of surprises and that there is very little she is not willing to do to prove a point or protect herself. All of this forms a basis for familial tension, further compounded by Jeanne’s suspicions. As those actions become more intense, viewers wait for the next action to take place, and also marvel at the complexity of the story, for this is no ordinary thriller.