In 1948, during the Berlin Blockade incident, there was a hidden conflict between the Eastern and Western spy agencies over the discoveries of a Nazi Germany occult research organization known as Ahnenerbe. The CIA and the Soviet State Security Ministry were engaged in a fierce battle to obtain Nazi experimental records, which involved offering priestesses as sacrifices to the ancient god Shub-Niggurath to open gates to other dimensions. At the heart of this struggle was a mysterious witch named Lady MacLeod, whose objective was to thwart the progress of both organizations and bury the forbidden knowledge in darkness. Lady MacLeod possessed a power called the "Black Goat's Satchel," which allowed her to command eldritch creatures from other realms. Known by the codename "H-21," she was a legendary female spy and, in truth, the enigmatic figure behind the infamous Mata Hari.