After her family is brutally murdered, Makina Hoshimura becomes a Shikabane Hime, a living corpse bound to the Kougon Cult, to seek vengeance against the mysterious undead organization that killed her. She is aided by Keisei Tagami, the priest contracted to her and a former friend. The series follows Keisei’s younger brother Ouri, a boy fascinated by death, as he gradually learns his brother’s secret and is drawn into the world of the Shikabanes.