In this musical-comedy, Dean Martin plays an American hotel mogul who becomes smitten with a young Italian woman (Anna Maria Alberghetti) when buying a hotel in Rome. To marry this gal, he has to get her three older sisters married off.

Don Pablo Salazar steals a fortune in jewels from an Indian tribe and an Aztec medicine man puts a curse on the jewels until they are returned. Years later, an American insurance man promises to deliver the Salazar fortune to the rightful heir...