Pasqualino Cammarata is an Italian naval officer who has been disliked by his admiral because of his high-level knowledge, given that he is quite incapable as an officer.
In 18th-century Rome, impish aristocrat Onofrio del Grillo amuses himself by playing pranks on all sorts of people — his reactionary family and fellow nobles, the poors, the French occupiers trying to modernize society, and even the Pope himself.
Gianna Amicucci works in the house of the head of her hometown police force and enters the academy with a kickback from him. She is a beautiful woman (she generously sheds clothes during the film) and has to overcome her male colleagues prejudices, but she gains their respect through a series of brilliant operations.
A psychiatric-clinic medical director runs some tests on two patients, the Ragionier Antonio Vignanelli and Cavalier Peppino Caprioli, so they must retrieve some memories of family life in order to understand their mental illness.
A collection of dark-humoured vignettes, including tales of a cardinal with a liberal congregation, a motorist and a hitchhiker, mentally challenged tramps, parents contemplating their daughter's participation in a pornographic film, and a conniving husband.