In this winsome comedy, an entitled Economics professor pursues a tactic to buy an ailing widow’s mansion for nothing, but he quickly realizes that his seemingly foolproof strategy won’t be as easy as he thought.
Fred, Achille, Max and Belette form a good-for-nothing gang of crooks. Dismally failing their last raid, they decide to get back in the game, kidnapping Sophie Marceau.
Unlucky in love, Alfred tries to commit suicide, only to be thwarted by police efforts to prevent a simultaneous attempt by a nearby young woman. Recovering, the young lady puts him up at her house, as he has run out of places to live. He joins a Parisian sporting team and seems to have transferred his bad luck to a corrupt television boss who is attempting to manipulate the game so that Alfred's Paris team loses.
Tüm entrika, bir kasada bulunan "carte-blanche" (kayıtsız şartsız yetki) belgeleri etrafında dönüyor. Bu belgelerdeki boşluğu kim doldurursa, bir revünün sahibi oluyor. İşin içinde büyük paralar var. Kasanın sahibinin yeğeni, amcasını kandırmaya ve belgelere kendi adını yazdırmaya çalışıyor. Ancak işler daha da karmaşık çünkü banka müdürünün de bu işte parmağı var. Bu düzeni, mütevazı bir banka veznedarından (Pierre Richard) başka kim bozabilir ki?