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While France is on strike, Jean, a Parisian bookseller, opens his shop. A former trade unionist, he has in fact decided not to take part in the movement. However, a phone call from his friend René awakens his enthusiasm.

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?