1968. Catherine, Yves and Hervé are twenty years old. They're students in Paris and they love each other. The May student uprisings radically change their lives. Overtaken by communal utopia, they leave the city with a few friends to set up house in an abandoned farm in the Lot region. A desire for freedom and the search for individual fulfillment lead them to make choices that cause them to separate.

A group of teenagers living in a housing project in the outskirts of Paris rehearse a scene from Marivaux's play of the same name. Krimo is determined not to take part, but after developing feelings for Lydia, he quickly assumes the main role and love interest in the play.