Tia Allbright, a young warrior, arrives on the island of Marcleida with Grandeek, a sword that holds a spirit that aids her on her quests. She is turned away at the entrance, but she is determined to get in and hunts for a way past the fences guarding it. Meanwhile another stranger reaches the island to take on a mysterious job. Someone has been killing the islanders, able to appear and vanish at will. The sword Aihorn has apparently been stolen, and its spirit wants revenge on those who killed its master fifty years ago. Tia and the stranger are both after Aihorn to stop its bloody mission, but the blade can possess whoever wields it. Luke, her hapless assistant, is at her side in this fantasy adventure OVA based on the manga by Kohime Ohse.