Gilda (1946)

Just arrived in Argentina, small-time crooked gambler Johnny Farrell is saved from a gunman by sinister Ballin Mundson, who later makes Johnny his right-hand man. But their friendship based on mutual lack of scruples is strained when Mundson returns from a trip with a wife: the supremely desirable Gilda, whom Johnny once knew and learned to hate. The relationship of Johnny and Gilda, a battlefield of warring emotions, becomes even more bizarre after Mundson disappears...