Jézabel, a worldly young woman, takes hold of Ariel, a shy and inexperienced young man, and leads him by hook or by crook through the wild side of Paris nightlife.

Walter is told by his boss, Sara, to deliver an urgent letter to Henri de Corinthe. On the way he finds a beautiful woman he had been eying in a nightclub, lying in the road, bound up. He takes her to a villa to get a doctor, and ends up being locked in a bedroom with her. While she is making love to him, he has visions of surrealistic images from René Magritte's paintings. In the morning, the girl, Marie-Ange, has vanished, the villa looks derelict, and his neck is bleeding. Was it all just a nightmare?