The Skipper is a charming old man loved by all his neighbors. What they don't know is that he is also Mr. 880, an amateurish counterfeiter who has amazingly managed to elude the Secret Service for 20 years.

Biff Jones is a driver/salesman for the Good Humor ice-cream company. He hopes to marry his girl Margie, who works as a secretary for Stuart Nagel, an insurance investigator. Margie won't marry Biff, though, because she is the sole support of her kid brother, Johnny. Biff gets involved with Bonnie, a young woman he tries to rescue from gangsters. But Biff's attempts to help her only get him accused of murder. When the police refuse to believe his story, it's up to Biff and Johnny to prove Biff's innocence and solve the crime.

Jenny Marsh, recently released from prison for killing a man, finds herself under the watchful eye of her parole officer, Griff Marat, who helps her secure a job caring for his ailing mother.