The noble Pantaleo Di Santa Paola has just died, and the preamble to his will is a confession in which he claims that in his youth he had a relationship with a circus rider that produced twin sons.

A daughter discovers her parents are far from being the rich bourgeois she thought they were.

A meek professor is swept over his feet by a very vivacious girl.

Guido Renzi and his lawyer friend chase a beautiful girl to return a purse that he lost and after a long drive in the car reach the laboratory of an improvised astrophysicist - the girl's father - who, together with another scientist, is about to take off in the direction of Mars aboard a missile.