A fairy tale of the misadventures of a beautiful but temperamental Neapolitan peasant, Isabella, when she meets the ill- tempered Spanish Prince Rodrigo Ferrante y Davalos. The King of Spain has ordered Rodrigo to choose a wife among seven Italian Princesses, but he is smitten by the lowly peasant.
The retired general Antonio Cavalli is a nuisance to his family: to his wife Francesca who still works, to his son and to his daughter-in-law. Then he finds a job in a building firm. Only by chance Cavalli finds out that his salary is paid by his wife to keep him busy. But the general is well known as a very reliable man, and Sandrelli, the firm's owner, uses him and his name to win a valuable contract. When Sandrelli is arrested, the general finds the money to honour his debt but he is robbed while he is going to the bank...
Roman police detectives interrogate a series of potential perpetrators in their struggle to determine whom to arrest for the brutal murder of a beautiful prostitute whose body is discovered in a park on the day of a torrential rainstorm. One by one, the prime suspects -- girl-crazy teenager Nino, pickpocket Canticchia, a soldier on leave, a tourist and a pimp -- recount the events of the day to the police, each insisting he is innocent.
Follows the adventures of a group of friends, teddy boys and rock and roll chicks whose crazy, fun-loving habits inspire jiving from some of Rome's citizens, and bitter complants from others which inspire a group of corrupt officials determined to a bring the group down.