Mario, a young philanderer, receives 13 antique chairs in a bad state by inheritance and decides to sell off them to get some money. Afterwards he gets to know that one of them contains documents worth a lot of money. So he begins an adventurous trip to regain possession of the chair. On the way he meets many strange people who would like to help or to swindle him.

When Count Contini attempts to destroy the world's economy by masterminding the theft of $1 billion in U.S. gold, ICE chief MacDonald summons secret agent Matt Helm to stop him.