Lago Maggiore, 1949: a failed bank manager, to revive his economic situation, tries to combine a marriage of interest for his daughter. Failing to do so, he then tries a robbery in his own bank.
Three characters' misadventures in semi-deserted, summertime Rome: a dim-witted mama's boy falls for a tourist; a would-be womanizer struggles to find company for his sex tourism trip to Kraków; a hippie is drawn into his father's schemes to bring him back into polite society.
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.