Jon Brown, a fledgling musician, and his fiance, Alison d'Ambrose, uncover additional clues to the destruction of her family's castle some twenty-one years ago. They know they must resolve the mystery of the brown dragon. Their search for the dragon is derailed for a time when they reach the Canyon Lands, whose inhabitants are plagued by vile demons from the Abyss brought forth by the terrible and powerful Marquis d'Gritz. Through many trials, the do discover the identity of those responsible for the distruction of Alison's family castle and rush off to confront them. However, the perpetrator has been dead for at least five years. Searching her tower for additional clues, they face almost certain death. Can they survive?"