The time is 1984. The place is Paris. A young, handsome man (Johan Libéreau) arrives and strikes up a platonic relationship with a wealthy doctor, Adrien (Michel Blanc), who exposes him to Sarah (Emmanuelle Beart) and Mehdi (Sami Bouajila), a young couple who have just had their first child. An unplanned love affair at the onset of a new, unnamed epidemic upsets the tranquility of their lives. The four friends are confronted with the end of the sexual revolution; each facing new possibilities.