When a Cuban man is killed on a New York street, the investigation leads to Havana and the man running an alien smuggling ring known as Palinov (George Macready). Pete Karczag (John Hodiak) is the immigration detective assigned to the case in Havana. To infiltrate the ring, he poses as a Hungarian refugee desperate to gain passage to America. While negotiating his trip he meets and falls for beautiful Marianne Lorress (Hedy Lamarr), who