Jean-Pierre Costa is a football manager upon whom fate appears not to be smiling. First, a friend, Annabelle, dumps a pet Labrador named Didier on him whilst she goes off to make a report in Los Angeles. Next, one of his star players is injured, leaving him one player short for a crucial match. As if things could not get any worse, Costa wakes up one morning to find that that Didier has been transformed into a man...