A Parisian police chief has an affair, but unbeknownst to him, the boyfriend of the woman he’s having an affair with is a bank robber planning a heist.
Sabine vows to give up married lovers, and is determined to find a good husband. Her best friend Clarisse introduces her to her cousin Edmond, a busy lawyer from Paris. Sabine pursues Edmond, with the encouragement of Clarisse, but Edmond does not seem very interested.
The whole intrigue is centered around carte-blanche documents kept in a vault. Whoever fills in the blank becomes the owner of a revue. Big money is involved. The nephew of the owner of the vault is trying to cheat his uncle and have his name in the documents. Everything is even more complicated because the manager of the bank has a finger in the pie, too. Who but a humble bank-teller (Pierre Richard) will ruin the scheme?
