Sandy, a busy model, lives with her "little" sister Rose in Paris as a subtenant. Since the death of her mother, Sandy has been responsible for Rose. The two sisters have different temperaments, but are still heart and soul. One day, the long-distance driver Max sees the beautiful Sandy on the Strafle and is struck by lightning. From now on, he concentrates all his energy on finding Sandy again. Thanks to the help of his friend Sylvester, he manages to meet Sandy. Sandy and Max become lovers. And Rose falls in love with Sylvester. One day, the tender love of four seems to break up for no reason at all: Rose does not return from photo shoots on the Côte d'Azur. The "little" Rose has trouble at school and hitchhikes south for no reason...