An American millionaire has just died. His sole legatee is a youthful indiscretion, a girl who is currently living in Italy. Two private eye detective agencies, in competition with each other, investigate. Combining business with pleasure, they search sunny Italy, but they only have one clue to...
In the prison of San Vittore there is, among other detainees, a strange type that they call "Il Cavaliere". The latter suffers a conviction for theft and his fellow prisoners have a certain respect for him.
Thirty girls arrive in a seaside town to participate in a beauty contest. Marina has no ambitions of victory: she only wants to have the sewing machine promised to each participant.
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.
Bored with her bourgeois life, the young Maria Variani, daughter of a professor, meets Bruno, who is part of an amateur jazz group, and allows herself to be persuaded to join the band that plays during the radio program "The microphone is yours".
Lisbon, the capital of Neutral Portugal, is a hotbed of spies. Mario, a cabaret singer working for the Allies is responsible for the death of an Italian agent. His widow Irène heads to Portugal and in her desire for revenge she agrees to work for the Nazis.
