Madame Doom was a European adventuress and a spy who sold her services to the highest bidder, even if that highest bidder happens to be one of the Axis powers. She was a recurring opponent of Black X, an American secret agent. During their first encounter, Black X and Madame Doom found themselves developing feelings for each other, even as they continued to oppose each other. During their next few encounters Madame Doom tried to convert Black X to her side while Black X tried to convert her to his. This culminated with Black X resigning from Secret Service to be with Madame Doom. For some reason, Madame Doom decided this meant that he would help her with her latest plot to assassinate Allied ambassadors, a plot that involved chemically induced suicide bombers. When the appalled Black X rej