New York, 1942. As brave men from the Bronx to the Battery sail abroad to fight the greatest war the world has ever seen, the Big Apple would be left vulnerable, if not for Miss Fury! The alter-ego of Marla Drake, possessed with agility, strength, stealth, and bravado, defends the city from saboteurs and criminals... but when a mysterious masked cult launches a mind-bending campaign of terror and industrial espionage on her watch, will she be able to defeat an enemy beyond mortal comprehension?

As Miss Fury prepares to take on the darkest occult elements New York has to offer, her alter-ego Marla wrestles with the suspicion that something sinister might be behind her own abilities as well. Can the supernatural be harnessed for good as well as evil? Or is Miss Fury trapped in a web of deceit from which there is no escape, no matter how hard she fights?

Miss Fury uncovers the sinister facts behind what the Minor Key is planning, but is it already too late to stop them? As time grows short, Marla delves deeper into her own shadowy past in Brazil, and the true nature of the power that she barely holds in check. Can it be used for good, or is she doomed to hasten the very thing she fears will come to pass?