Three girls: Susanne, Annie and Catherine, just have finished high school and meet every night to have a good time in discos and bars with frequently changing boyfriends. Susanne’s younger sister Betty often joins them and copies their behavior, believes everything they say. So she soon ends up with with projectionist George – although she doesn’t take the pill yet.

Daniel lives with his grandmother and, after a year of high school, goes to live with his mother in the south of France; a harsher environment which rapidly changes his perception of friends, work, and women.