Delphine Zentout

Lili, a pouty and voluptuous 14-year-old, is caravan camping with her family in Biarritz. She's self-aware and holds her own in a café conversation with a concert pianist she meets, but she has a wild streak and she's testing her powers over men, finding that she doesn't always control her moods or actions, and she's impatient with being a virgin... (imdb)

Jean Delvaux, nicknamed don Juan, is found dead. Was he murdered or did he kill himself? The investigation is assigned to Det. Montijoux, a disillusioned man. It leads him to the beautiful Emeline Silvani, who's suspected to be the dead man's lover.