Blanche is freshly installed in Cergy-Pontoise, a trendy new town near Paris. She has a new apartment, a new job with no one over and no one under her. She meets Léa at lunch one day, and soon she meets an acquaintance of Léa, Alexandre, whom she approaches somewhat awkwardly. The film then follows the time-honored plot of exchange of relationships, as Blanche and Léa switch boyfriends.