In the middle of a performance of the play "Le Cocu", a very bad boulevard comedy, Yannick gets up and interrupts the show to take the evening back in hand.

As Jean, a conservative, campaigns to be reelected mayor of a small town in northern France, Edith, his spouse of 40 years, tells him a secret he can no longer repress: in his heart, he is - and always has been - a man.