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.
Kids from a huge apartment complex in Rome form a secret society to unite their forces and get back at the nasty adults who 'oppress' them, playing pranks on them to expose their weaknesses.
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.
Antonio, a former variety actor, keeps his daughter in an excellent boarding school by organizing small scams with his friend and colleague Felice. Commissioner Malvasia good-naturedly persecuted him. When their respective unsuspecting children fall in love, the two fathers make peace.