Natalia is to be married to a German sailor much older than herself, but two days before the wedding she meets Diego, a mysterious young dancer, and they fall immediately in love. When he serenades her on the eve of the ceremony, Natalia's father unwittingly invites him to the festivities. There they dance a tango charged with passion, before Diego vanishes, knowing she is lost to him. Soon after the marriage Natalia father dies, and her husband is lost at sea, presumed dead. Penniless and alone, she endures a desperate existence until she becomes a dancer in a tango hall. Diego discovers her there and vows to bring her away from this existence, but their reunion has devastating consequences.