Plot

Claire, a 50-year-old divorced teacher, creates a fake Facebook profile of a 24-year-old woman to catfish Alex, the roommate of her former lover, Ludo.

Claire, a 50-year-old divorced teacher, creates a fake Facebook profile of a 24-year-old woman. She finds a photo of a pretty young brunette online and uses it. She has created an entirely fictional character, but why? Originally she did it to spy on Ludo, her on-and-off lover. But Ludo only accepts friend requests from people he knows personally. To get to Jo, Claire sends his best-friend Alex a friend request and he accepts. The pair begins to exchange messages and their fake friendship turns into a fake love affair. Claire is in love with Alex and he is in love with her fake profile. Now he wants to meet the 24-year-old beauty he's been chatting with. She invents a busy job, professional trips and even a jealous ex. The more and more in love they are the more the situation becomes unbearable. Claire is torn between the impossibility of this love and the pain of having to admit her deception and risk losing it.

Claire (Binoche) is a university lecturer and mother of two teenage boys, who is contending with the approach of middle age and remains stung by the betrayal of her ex-husband (Berling), who is building a new life with another partner. Claire has a new lover too, the handsome Ludo, but is under no illusions as to his fidelity. Out of a mix of petulance and curiosity, she impulsively creates a fake Facebook profile in which to keep an eye on him.