Four years earlier, American gambler Jim Forster, Dane Clark, was broke and chasing a streak of luck that would change his life. A small loan from Maxie at Maxie’s Barn seeds a rise that sees him build a network of posh illegal casinos, a nightclub, and other ventures across London. In this world of glamour and danger, he longs for acceptance among the British upper class and seeks guidance in courtesy from Miss Minter Mona Washbourne, whose patient lessons frame his every move.
One night, Jacko Spina [George Pastell] reluctantly accepts a cheque from Lord Peter Willens for gambling losses. When the cheque bounces, Jim orders Jacko to walk away, but Jacko pushes to collect anyway. A brutal confrontation follows: Willens is roughing it out by force, and Jim denies any direct involvement. Willens later returns to Jim and says he’ll be paid in a week, while Jim insists he had nothing to do with the beating. The fallout is immediate: Jim fires Jacko and the episode foreshadows the tightening grip of organized crime on Jim’s booming empire.
Pat, a professional dancer at Jim’s nightclub, is the movie’s emotional counterpoint. Played by Kathleen Byron, she confronts Jim’s infatuation with a more glamorous life and begins to drink more heavily as the relationship sours. The tension deepens when Jim notices Lady Susan Willens, Lord Willens’s sister, dancing with him at a major party. Susan [Naomi Chance] is kind to Jim, inviting him to a boxing match, a moment that Pat witnesses with growing jealousy and disapproval.
After Jim turns down Arturo Colonna [Eric Pohlmann], the Colonna family’s return to power becomes personal. Jim’s nightclub and two of his casinos suffer deliberate damage, but he refuses to bow to the threat. The Colonnas, who once ran rampant in the United States before deportation, now seek control of Jim’s London enterprises. Peter Willens presses Susan to persuade Jim to invest in a supposed gold mine, run by promoter Richard Farning [Anthony Ireland], and, despite Dave Davies’s warnings, Jim sells out his remaining assets to the Colonnas. The “mine” soon proves to be a scam, and Jim, who has resisted alcohol to keep his temper in check, begins to drink heavily as his judgment slips.
As the Colonnas tighten their grip, Jacko tips off the police about Jim’s gambling operations and lies to Arturo Colonna about Jim’s supposed role in the raids. When Arturo’s forces, including Angelo Colonna [Enzo Coticchia], come to Jim’s home, Dave Davies [Meredith Edwards] is found there and is killed by Angelo in a tragic misstep. Jim, furious at the betrayal and the killing of his friend, seeks revenge, setting off a chain of violence that draws in Pat and Susan.
A brutal shootout follows, leaving Jacko and Angelo dead. Jim is wounded in the arm but escapes into the streets. Pat pursues him in a car and runs him down, a desperate gesture that brings Susan and the loyal butler to the scene. They carry Jim back to the house, and the ending leaves his fate uncertain—whether he will recover or succumb to the consequences of a life built on gambling, loyalty, and betrayal.