In 1954, C cile, a Parisian high school student, spends the summer of her seventeenth birthday in a villa with her father Raymond, a widower, and Elsa, his mistress. C cile and her father have a close relationship, carefree and full of pleasure. The atmosphere changes when Raymond announces the arrival of a friend, Anne. Different from Elsa and C cile, Anne is a strict and moralizing woman. She appreciates culture, good manners, and intelligence. As soon as she arrives, a subtle conflict begins between the three women. Elsa tries to maintain her relationship with Raymond, who is also attracted to Anne. As for C cile, she fears losing the complicity that binds her to her father, as well as their freedoms. How can she avert the threat? In the burning heat of the summer, a cruel game is being prepared with tragic consequences. A remarkable adaptation of the classic bestseller by Fran oise Sagan which shocked a generation.