Black Dragons

Nazis send plastic surgeon Dr. Melcher (Bela Lugosi) to Tokyo where he transforms Japanese spies into identical copies of prominent American businessmen. In order to keep their secret safe, the Black Dragons, an organization of fanatic murderers, imprison the doctor and plan his execution. The Japanese "duplicates" begin to commit acts of sabotage and destruction. The plan seems foolproof until the imposters begin to turn up dead on the steps of the Japanese Embassy. Secret agent Dick Martin (Clayton Moore) is brought in to investigate. He uncovers a trail of horror discovering that Dr. Melcher has been kidnapping, killing and even turning his victims into deformed monsters. (official distributor synopsis)