Professor Fabius has found a way of transferring his personality to another person and he transfers his to the body of Giacinto Floria, a nice teacher in a women's college. Poor Giacinto becomes a sex maniac to the puzzlement of his girlfriend Mafalda.

Claudio and Maurizio, two young and reckless taxi drivers in a Roman gas station meet two American tourists, daughters of a Spanish man that has oil wells in America. Maurizio and Claudio walk the tourists to the Eternal City and forget their girlfriends Patricia and Lorella. The brides, aware of their wanderings,begin to pay them with the same currency.

During the first Napoleonic expedition into Italy, Thibaud is seriously injured before being caught up in a mystery involving his wife, her rightful inheritance and his own daughter's happiness.