Antonio (played by Totò) and Camillo (played by Nino Taranto) live by organizing small scams and often manage to escape thanks to the benevolence of Law Commissioner Malvasia (played by Ernesto Calindri), a former classmate of Antonio.
Antonio employs his profits to pay for the studies of daughter Diana in college. The girl is unaware of the real work of her father, who pretends he is an important diplomat around the world. Among Antonio's victims is also the Commissioner's son (engaged to his daughter). Everything will work out for the better when Antonio unexpectedly receives a billion-dollar inheritance from America.