Makina Hoshimura becomes a Shikabane Hime, a living corpse hired to the Kougon Cult, after being cruelly killed along with her family, in order to exact revenge on the mysterious undead organization responsible for her death. Keisei Tagami, her contractual priest and erstwhile friend, assists her in her quest. This series tells the narrative of Keisei's younger brother Ouri, a child with a strange fascination with death who gradually discovers his brother's secret and is drawn into the world of the Shikabanes.