Abel is shocked when Marianne tells him one morning that he has to leave their apartment immediately. She is pregnant - by his best friend Paul.
Eight years later, after Paul's sudden death, the two meet again at his funeral. Abel (Louis Garrel) is still attracted to Marianne (Laetitia Casta) and soon he moves back in with her at the old place.
The new romance between the two evokes the jealousy of two people: Marianne's son Joseph, who doesn't want to see his deceased father replaced by Abel, and Paul's sister Eve (Lily-Rose Depp), who has long been in love with Abel and won't sit idly by and watch this new relationship.
"A light as well as profound film and always elegant." (Le Nouvel Observateur)