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Returning to Singapore after a five-year absence, WWII veteran Matt Gordon (Fred MacMurray) mournfully recalls his romance with, and marriage to, a girl named Linda (Ava Gardner), whom he assumes was killed in a bombing raid on their wedding night. Resuming his prewar profession as a pearl smuggler, Matt gets mixed up with gangsters who are seeking a cache of pearls that he hid somewhere in Singapore during the war. He also meets wealthy Michael Van Leyden (Roland Culver), who is married to a woman who closely resembles the lamented Linda. In point of fact, she is Linda, but has been suffering from amnesia ever since the wartime bombing. Upon being reunited with his lost love, Matt does his best to ditch his unsavory companions and to rescue Linda from her "new" life. Clearly inspired by Casablanca, Singapore was remade as the 1957 Errol Flynn vehicle Istanbul.