Jeanne (Hélène Fillières) a successful osteopath has been married to David (Anthony Delon) for 8 years and they have a son together Louis (William Wayolle).

Marie decides to cheer Jeanne up by taking her to the ocean for the weekend with her little brother Moïse (Thierno Sy).

In the morning Jeanne, still confused about her feelings the night before, decides to take the train home early, leaving Marie and Moïse to enjoy the weekend together.

Jeanne, faced with decisions about her sexual orientation, consults her friend Eloïse (Karole Rocher), telling her she thinks she is a lesbian and in love with Marie.

David then goes to meet Jeanne and tells her to stop seeing Marie or he won't let her see her son Louis.