Leo is warming up. He's going to lost the race against Rocco. The worst part is that Diane is going to the movies with the winner. Mot arrives in time to make Leo jump through time - then seconds later - to the finish-line, in front of the show-off Rocco ... Bad luck! Mot transports his friend to a parallel universe, a world very similar to ours but with one little difference. It is a world where Leo's parents had a daughter! Léa! It's going to be tough for Leo to run in pumps, even without counting on Rocco, who is in love with Léa, to whom Leo, squeezed into a dress, bears a strange resemblance...