Friends Philippe and Laurent (Pierre Amoyal and Denis Charvet), a violinist and a cello player, frequently team up to play special gigs. Laurent is usually strapped for cash. While performing for a wedding, the two of them meet the high-class Sophie (Margaux Hemingway). They have also been rehearsing for a performance of Bach's Mass In C Minor, moments from which are interspersed throughout the film. Unfortunately for Sophie and the musicians, both of whom she eventually has relationships with, Sophie has an entirely unscrupulous drug-peddling mother, who will stop at nothing to pursue her plans.