New York, 1929, a war rages between two rival gangsters, Fat Sam and Dandy Dan. Dan is in possession of a new and deadly weapon, the dreaded 'splurge gun'. As the custard pies fly, Bugsy Malone, an all-round nice guy, falls for Blousey Brown, a singer at Fat Sam's speakeasy. His designs on her are disrupted by the seductive songstress Tallulah who wants Bugsy for herself. How is Bugsy to get the girl and help Fat Sam defend his business against the deadly Dan and his dastardly tricks?