Subaru Sumeragi is the 13th head of the Sumeragi Clan and a highly powerful onmyouji. Subaru is hired to exorcise a construction site, but his employer dies under mysterious circumstances. The only suspect is a man who repeatedly walks away from situations in which he should have died. Then Subaru meets a young woman intent on cursing the man, claiming that he killed her brother. Subaru must figure out how his employer died and fight the evil spirits protecting the man, with the help of his friend and twin sister, Seishirou Sakurazuka, and Hokuto Sumeragi.