While on a trip to Paris with his fiancée's family, a nostalgic screenwriter finds himself mysteriously going back to the 1920s every day at midnight.
In the middle of a performance of the play "Le Cocu", a bad boulevard comedy at a Parisian theatre, Yannick gets up and interrupts the show to take the evening back in hand.
Without warning a father comes to visit his daughter abroad. He believes that she lost her humor and therefore surprises her with a rampage of jokes.
