A fictionalized biopic of Aline Dieu, a multitalented singer from a musically inclined family.

When Thomas Platz is suddenly made the guardian of a baby - then pretends to be its real father in order to win back Marie, the girlfriend who dumped him a year before. Stuck between staying a man-child forever, and proving he is ready to take the next steps of marriage and family with the love of his life, Thomas goes on an unexpectedly hilarious adventure getting the girl of his dreams to believe he has changed.

Paul may be a successful psychoanalyst but he fails to realize that his own marriage to Carla is failing. One of his patients, Raphaël, confides in him that he is in love with a married woman. In the course of the discussion, Paul understands that the woman in question is his own wife, Carla. Rather than end the consultation, Paul decides to manipulate his patient in an attempt to win back his wife. But Raphaël is not as stupid as he looks...