Aleister Crowley spent years at Boleskine House, a estate on the shore of Loch Ness that has attracted almost as much rumor as the loch itself. Newspapers in his lifetime called him "the wickedest man in the world," and this film traces how that reputation formed around the house, from reports of ritual magic performed on the grounds to stories of visitors who left disturbed by what they saw or heard there. Interviews with Crowley scholars and occult historians sort out what can be documented about his practices at Boleskine, including his interest in ceremonial magic and his later influence on Wicca, from what grew in the retelling over a century of local legend. The film also covers the house's own troubled history after Crowley left it, including fires and a string of owners who reported strange incidents. It stays close to Boleskine House as its anchor throughout, using the physical building to test which parts of the Crowley legend hold up and which are just a good story attached to a real address on Loch Ness.