Jihun Seo is a civil servant who wants nothing more than a peaceful, easy life. But after an angry complainant stabs him, he wakes up in the Murim, a world ruled by martial arts. Reborn as Ilmok, he quickly settles into a quiet job at a local inn, only for the Heavenly Demon to appear and force him to become his disciple. Now surrounded by deadly martial artists and even deadlier training, can Ilmok survive the Demonic Cult without sacrificing the one thing he values most: a healthy work-life balance?