For Pierre Brochant and his friends, Wednesday is “Idiots' Day”. The idea is simple: each person has to bring along an idiot. The one who brings the most spectacular idiot wins the prize. Tonight, Brochant is ecstatic. He has found a gem. The ultimate idiot, “A world champion idiot!”. What Brochant doesn’t know is that Pignon is a real jinx, a past master in the art of bringing on catastrophes...
After hiding his loot and getting thrown in jail, brooding outlaw Ruby befriends Quentin, a dim-witted and garrulous giant. After Quentin botches a solo escape attempt, they make a break together. Unable to shake the clumsy Quentin, Ruby is forced to take him along as he pursues his former partners in crime to avenge the death of the woman he loved and get to the money.
Caught by tabloid paparazzi with his mistress Elena, a famous and beautiful fashion model, billionaire Pierre Levasseur tries to avoid a divorce by inventing a preposterous lie. He uses the presence of a passerby in the photo to claim to his wife that it's not him Elena is seeing but the other man, one François Pignon. Pignon is a modest little man who works as a parking valet. To make the story convincing, Elena has to move in with Pignon.
