The Master of Darkness demonstrates that "crime does not pay" in three pulp thrillers by Walter B. Gibson! First, disappearing fish and vanishing corpses provide a sinister puzzle that only The Shadow can solve! Then, death threatens the life of an eccentric scientist when his amazing invention attracts the attention of a "Syndicate of Death." Finally, murder lurks behind Mardi Gras' satanic cosplay as The Shadow grapples with a criminal mastermind concealed by "The Mask of Mephisto."