It is prior to the commencement of World War II, and 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.
Bela Lugosi
as Dr. Melcher/ Monsieur Colomb
Clayton Moore
as FBI Agent Richard ‘Dick’ Martin
Joan Barclay
as Alice Saunders
George Pembroke
as Dr. William Saunders
Robert Frazer
as Amos Hanlin
Robert Fiske
as Phillip Wallace
Irving Mitchell
as John Van Dyke
Edward Peil Sr.
as Ryder
Kenneth Harlan
as FBI Chief Colton
Max Hoffman Jr.
as Kearney
Joseph Eggenton
as Stevens
I. Stanford Jolley
as The Dragon
