Following the outbreak of World War II, Japanese spies known as "Black Dragons" ingeniously transformed by plastic surgery into doubles of prominent American business leaders, use their disguises to cause sabotage, labor unrest, and other measures to destroy the U.S. economy. The Nazi doctor who has performed the surgery now bears a grudge against the Japanese, visits the fifth columnists, and, after turning them into zombies, sadistically murders...

[The black dragons] "Just prior to the start of World War II, a doctor operates on six Black Dragon Society Japanese operatives and transforms them into exact duplicates of six high-ranking American businessmen who are replaced by these look-alikes. With their operatives in place, a plan to sabotage the American war effort appears to be set." [The invisible ghost] "Bela Lugosi stars in this Monogram thriller as a man living with his daughter while...