Detective Kitty O'Day

Donald Wilson tries to make a living in New York City with different jobs. He reads detective novels all the time, so that his distraction causes him to have various misadventures that repeatedly cost him his jobs. A notice on a notice board draws his attention to the detective training of Paul Miller, whose school he attends. The school is located in a run-down house and the owner Paul has all kinds of debts with various creditors. Instead of getting a decent education, Donald, the only detective candidate at the school, is financially exploited and has to take part in Paul's fraudulent actions to reduce his debts. Both of them accidentally get into conflict with three Italian cheese-making families, the Lombardis, the Zanettis and the Falcones. They discover Caterina Zanetti, the woman who was kidnapped by the Falcones, the woman Carlo Lombardi actually wanted to marry. Carlo has been told in a fake letter that Caterina has fallen in love with another man. The Falcones now want to marry him to Sonia Falcone in order to maintain their position in the Italian cheese market. Caterina can give the two unsuspecting Americans a message to deliver to their cousin Mario Zanetti at the airport so that the wedding can be stopped.