Michel Hartog, a rich industrialist, hires a troubled young woman, Julie, straight out of the psychiatric asylum to which she has been consigned for several years - to work as a nanny for his bratty nephew Peter. But Hartog's seemingly altruistic impulse hides a darker motive. He plans to stage a fake kidnapping of his nephew and use Julie as a scapegoat. Unfortunately for Hartog, Julie proves infinitely more tough and resourceful than he expected as the kidnapping goes horribly wrong.