12 year-old Sebastian has decided not to follow his father and Angelina to Canada, deciding to stay in the alps to watch over Belle who has now become the mother of three beautiful pups. When a stranger arrives claiming to be Belle’s rightful owner, Sebastian will do all it takes to protect his best friend and her little ones.

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.