In Chicago during the 1930s depression, sheet music salesman Arthur Parker is trying to sell his products, but it's not easy to convince unwilling music store owners to buy them. Although he's already married to the somewhat drab Joan, when he meets school teacher Eileen in a music store, he falls in love with her.

DJ Zack and pimp Jack end up in prison for being too laid-back to avoid being framed for crimes they didn't commit. They end up sharing a cell with eccentric Italian optimist Roberto, whose limited command of the English language is both entertaining and infuriating -but rather more useful to them is the fact that Roberto knows an escape route