In Europe and the Pacific, World War II rages on. Meanwhile, on the American homefront, the world's most dangerous saboteur--Mura Sakima of Japan (Johnny Arthur)--is determined to cripple United States munitions factories. It's too bad for Sakima that the lengendary Masked Marvel is determined to stop him!
Who is the Masked Marvel?--you ask. He is one of four insurance men who wear exactly the same clothes every day. No, it doesn't make sense now, but it will after you watch the serial. Every kid will want to become an insurance claims adjuster after seeing THE MASKED MARVEL! (1943 - Republic Pictures)