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.

Vincent Elbaz
as Stéphane

Shanna Keil
as Victoria

Marie Gillain
as Anna

Éric Elmosnino
as Thierry

Tchéky Karyo
as Bruno

Eric Savin
as Jean-Paul

Romain Lancry
as M. Darmet

Vincent Deniard
as Brice

Ezio Sutter
as Baptiste

Monique Barbarat
as La grand-mère