PAL/Region 0. Prior to World War II, Japan's fiendish Black Dragon Society is hatching an evil plot with the Nazis. They instruct a brilliant scientist, Dr. Melcher, to travel to Japan on a secret mission. There he operates on six Japanese conspirators, transforming them to resemble six American leaders. The actual leaders are murdered and replaced with their likeness and Dr. Melcher is condemned to a lifetime of imprisonment so the secret may die with him.