里昂是个富有的出版商，某天他正驾车穿越森林时，他被陌生的女人露露迷惑，他疯狂的爱上了露露。然而露露的行为诡谲难测，里昂对关于露露的一切变得多疑而偏执，当他发现儿子跟露露全裸在床上时，他决定摆脱露露，但…

Leon Mortier, a wealthy publisher, whilst driving through the forest one day, stops when he sees Lulu walking down the long narrow road. She gets into the car. Leon is amused and intrigued by her. When he pulls off, suddenly out of nowhere a man appears in front of the car and Leon accidentally hits him. He decides to take them both home to recover. Leon falls madly in love with Lulu. Both Lulu and the man stay on with him in the house. Lulu's behavior is unpredictable. Leon becomes suspicious and paranoid about her. As he begins to suspect that his friends are being unfaithful with Lulu, he decides to throw a dinner party with some of his closest friends. During the dinner he wants to confront them with their infidelity and expel them all from his life with Lulu. But when he discovers his son in the arms of Lulu, he decides also to get rid of her, a plan which backfires in a most unexpected way.

Alors qu'il traverse une forêt en voiture, Léon Mortier, un riche éditeur, rencontre Lulu, une femme mystérieuse qui marche en bord de route. Il l'invite dans son véhicule, et immédiatement, un homme bizarre surgit, et monte également. Ces deux personnages vont s'inviter chez Léon, qui va devenir amoureux de Lulu, puis mortellement paranoïaque...