Tia Allbright, the unyielding warrior-woman, and her hapless assistant, Luke, face demonic killers in an imaginary world filled with magical wonders and sword showdowns. Armed with her trusted sword, Grandeek, which houses a valuable spirit, Tia sets foot on Marcleida Island but is met with opposition. Despite the setback, she persists in finding a way past the guarded barriers while a newcomer takes on a covert assignment. The island inhabitants have been brutally murdered by an elusive perpetrator who can appear and disappear at will. When they discover that the Aihorn sword is missing, which carries a vengeful spirit seeking vengeance against its fallen master for fifty years, Tia and the stranger aim to retrieve it and terminate the bloodshed. However, the sword poses a perilous threat as it can possess its handler and put them in grave danger. In this daring endeavor based on Kohime Ohse's manga, Tia and Grandeek embark on their most perilous mission yet.