A gangster and his mob buy a small-town in this warm comedy. They, tired of trying to make it as big city hoods, buy the town to use as a hideout. The leader of the gang begins to have a change of heart after he begins falling for a local girl.

When a landlady finds one of her tenants murdered, Inspector Hornleigh is sent to investigate. Inspector Hornleigh's assistant, Sergeant Bingham, soon finds an attaché case that had been stolen from the murdered man. When Hornleigh examines the case, inside it he finds a bag that was used to carry important government documents. The documents have been taken, and to make things even more confusing, a duplicate of the stolen bag soon turns up.

Duke and Jeanie Benson, an outlaw couple hiding out under assumed names. Duke realizes that he has a winning sweepstake ticket and will win $150,000 if he can cash it in without getting apprehended.

A federal agent goes to work for a taxi company believing it to be a front for a gang of counterfeiters.

A detective's wedding is postponed when gunshots are heard nearby.

A criminal psychologist tries to help a beautiful heiress going mad in a haunted mansion.

Millionaire sportsman Hiram Brighton hires gumshoe Michael Shayne to keep his spoiled daughter Phyllis away from racetrack betting windows and roulette wheels. After Phyllis slips away and continues her compulsive gambling, Shayne fakes the murder of her gambler boyfriend, who is also romancing the daughter of casino owner Benny Gordon, in order to frighten her. When the tout really ends up murdered, Shayne and Phyllis' Aunt Olivia, an avid reader of murder mysteries, both try to find the identity of the killer.

In a series of flashbacks, shows that attorney John Morland has given a lift to a hitchhiker who turns out to be a murderer. As a result, Morland himself is implicated in a killing. A pair of detectives discover that Morland has been having business problems and no end of difficulties with his wife Catherine. The trail of clues leads to a surprising revelation.

The Crime Doctor gets involved in the case of the poisoning of a wealthy industrialist.

Private eye Mike Shayne encounters a large amount of trouble while attempting to guard a murder witness.