Fanny (Lou de Laâge) and Jean (Melvil Poupaud) have all the ingredients of an ideal couple: they have professional success, they live in a beautiful apartment in one of the best neighborhoods in Paris and they seem to be in love like the first day they met. But when Fanny chances upon her old schoolmate Alain (Niels Schneider), she is immediately smitten with her charms. Soon they see each other again and their relationship becomes more intimate.