Out of fog-bound Washington, D.C., much as the dark London streets of Sax Rohmer's Fu Manchu novels, comes a creature of consumate evil - Dr. Yen Sin. This sinister head of an international spy network known as the Invisible Empire is a master of the cunning art of diabolical death. Battling him and his fiendish devices, such as death rays and blow guns, is Michael Traile, who works with the cooperation of the federal government. Only three issues of this magazine were published. A fourth Dr. Yen Sin novel, The Case of the Faceless Man, was announced, but never published.
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