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.
Dick Powell
Johnny O'Clock
Evelyn Keyes
Nancy Hobson
Lee J. Cobb
Inspector Koch
Ellen Drew
Nelle Marchettis
Nina Foch
Harriet Hobson
Thomas Gomez
Pete Marchettis
John Kellogg
Charlie
Jim Bannon
Chuck Blayden
