Seo Ji-hoon, a humble level-9 civil servant, only wanted a peaceful, uneventful life. But when he’s killed by an irate citizen’s knife, he wakes up in a world of martial arts. Even here, he resolves to live quietly—until an old man puts a sword to his throat. “Choose: die here, or become my disciple.” That old man is none other than the leader of the Heavenly Demon Sect. Forced into apprenticeship, Ji-hoon draws on his sharp intellect and the discipline of a former bureaucrat to rise within the sect. Yet the more he succeeds, the more headaches come his way: Why does he keep getting promoted? Why does he keep being pushed toward the throne of the Heavenly Demon? His wish was simple—“a peaceful life.” But destiny has other plans, dragging him down a runaway path toward demonic supremacy.