Casque d'Or ("Golden Helmet") is a 1952 French film directed by Jacques Becker. It is a Belle Époque tragedy, the story of an ill-fated love affair between characters played by Simone Signoret and Serge Reggiani. The story was loosely based on an infamous love triangle between the prostitute Amélie Élie and the Apache gang leaders Manda and Leca, which was the subject of much sensational newspaper reporting during 1902.
Marie (Simone Signoret), a woman of considerable beauty, is distressed at her treatment by Roland, a criminal who is a part of a local syndicate. When Marie is introduced to the handsome stranger Georges, a humble carpenter, she falls in love with him instantly, much to the chagrin of Roland. When Roland's jealousy builds after a number of meetings between Marie and Georges, Roland decides to confront Georges behind a club where a number members of his syndicate watch. After Georges gains control of a knife that had been thrown between them to initiate the fight, George manages to stab Roland in the back after a brief scuffle, killing him almost instantly. When the police arrive at the scene everyone flees, including Marie, who seeks refuge away from the syndicate at a nearby village.