Inspired using his mistress Elena, a famous and gorgeous fashion model, billionaire Pierre Levasseur tries to avoid a divorce by inventing a lie. He uses the presence of a passerby in the photo to maintain his wife that it's maybe not him Elena is currently visiting but just one François Pignon, the other man. Pignon is a little man who works like a parking facility. Elena has to move around in with Pignon, to make the story persuasive.