In a world hit by a wave of mutations transforming humans into animals, François does everything he can to save his wife. As some of the creatures disappear into a nearby forest, he and their son Émile embark on a quest that will change their lives forever.
Stéphane decides to move to the beautiful mountains of Cantal in order to reconnect with his 8-year-old daughter, Victoria, who has been silent since her mother's disappearance. During a walk in the forest, a shepherd gives Victoria a puppy named "Mystery" who will gradually give her a taste for life. But very quickly, Stéphane discovers that the animal is in reality a wolf… Despite the warnings and the danger of this situation, he cannot bring himself to separate his daughter from this seemingly harmless ball of hair.
Sibyl, a jaded psychotherapist, returns to her first passion: writing. But her newest patient Margot, a troubled up-and-coming actress, proves to be a source of inspiration that is far too tempting. Fascinated almost to the point of obsession, Sibyl becomes more and more involved in Margot’s tumultuous life, reviving volatile memories that bring her face to face with her past.
