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.
| Actor | Role |
|---|---|
 Vincent ElbazStéphane | Stéphane |
 Shanna KeilVictoria | Victoria |
 Marie GillainAnna | Anna |
 Éric ElmosninoThierry | Thierry |
 Tchéky KaryoBruno | Bruno |
 Éric SavinJean-Paul | Jean-Paul |
 Romain LancryM. Darmet | M. Darmet |
 Vincent DeniardBrice | Brice |
| EEzio SutterBaptiste | Baptiste |
| MMonique BarbaratLa grand-mère | La grand-mère |
 Matthieu WarterGénéral Warter | Général Warter |
 David LevadouxGendarme 1 | Gendarme 1 |
| CClélia-Marie GrelierGendarme 2 | Gendarme 2 |
| SSébastien Saint-MartinLe louvetier | Le louvetier |
| CChristian EustacheBerger 1 | Berger 1 |
 Thierry SimonBerger 2 | Berger 2 |
 Sky AlexisVictoria (English version) | Victoria (English version) |