When the Valley falls to Sunblade and Carla's mother is captured, Carla realizes that only her father is powerful enough to defeat Sunblade and save her mother. But Athol is a prisoner of the High Court in the Realm Under the Hill. After the assassination of the Aos Si king, Shade has escaped but is hurt and dying. He flees into the hands of an unexpected benefactor who leads him back to Carla. Shade and Carla fight their way into the forbidden Realm Under the Hill to free her father, despite the warning that if they go Under Hill, they can never return.