A trucker with a pregnant wife fights a New York mobster's protection racket.

When an employee at an illegal gambling den dies suspiciously, her sister, Nancy, looks into the situation and falls for Johnny O'Clock, a suave partner in the underground casino. Selfish and non-committal by nature, Johnny slowly begins to return Nancy's affection and decides to run away with her, but conflict within his business threatens their plans. As Johnny tries to distance himself from the casino, his shady past comes back to haunt him.

Embittered after serving time for a burglary he did not commit, Joe Bell is soon back in jail, on a prison farm. His love for the foreman's daughter leads to a fight between them, leading to the older man's death due to a weak heart. Joe and Mabel go on the run as he thinks no-one would believe a nobody like him.

Shipwrecked fugitives try to escape a brutal sea captain who's losing his mind.

A Brooklyn pier racketeer bullies boat-owners into paying protection money but two fed-up fishermen decide to eliminate the gangster themselves rather than complain to the police.

The daughter of a Nevada casino owner gets involved with a racketeer, despite everyone's efforts to separate them.