Chris, an 18-year-old from a wealthy family, is vacationing in Saint-Tropez with her mother. Unscrupulous, seductive, and confident in her sensuality, she stirs up trouble among all the men, especially those in relationships. The only one who resists her is Romain, a dandy with gigolo-like qualities who supplies wealthy yachtsmen with naive young vacationers. Romain only has eyes for Chris's mother.