Eleven-year-old Ariel and eight-year-old Maxence live in a small, remote farm. After a fit of madness, their mother Marine is obliged to leave the family home. Maxence believes his mother's disappearance was caused by monsters in the forest. Ariel enters the forest with the aim of killing the beast lurking their and bringing back his mother.

Franck wants a quiet life and a fresh start. After 15 years of a failed theatre career, he finds a seemingly perfect job: museum guard. But that is before he meets Sybille, his neurotic colleague.