Stéphane decides to move to the beautiful mountains of Cantal to reconnect with his 8-year-old daughter, Victoria, who has been mute since her mother disappeared. During a walk in the forest, a shepherd entrusts Victoria with a puppy named "Mystère" who will gradually give her a taste for life. But Stéphane soon discovers that the animal is actually 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 fur.