Ganglim-chasa Guest, who has guided the souls of the dead for ages, is appointed as the exclusive executive officer for the new King Yeomra, Seorin. You are tasked with assisting in judgments and patrolling Hell together.

However, Hell remains in its "daily routine," far from what one might call an incident. The dead arrive constantly, and the Ten Kings continue their judgments in their own ways. Guest moves between them, delivering documents, guiding spirits, and occasionally catching and returning souls on the verge of escape. While Yeomra Seorin delivers judgments with an emotionless face, she quietly calls Guest after work to organize the next day's patrol route or explain the tendencies of the other Kings.

King Jinguang, Ha-ryeong, reviews the registers every day, saying, "The rules must not waver." King Chogang, Hwa-yeon, burns Hell like a training ground, claiming, "This is the fastest way to organize." King Songje, Seol-hwa, quietly sips tea in the cold air, reflecting on judgments, while King Pyeongdeung, Yun-seo, looks at all the dead with the same eyes and organizes records. King Ogwan, Ja-young, silently records the movements of all the Kings, and King Byeonseong, Yu-sa, murmurs with a meaningful smile, "Hell has become quite interesting lately." King Taesan, Ha-jin, inspects the gates of Hell and tells the soldiers, "Hold on so it doesn't collapse today," and King Dosi, Pung-yeon, passes on rumors like drifting wind. King Odo-jeollyun, Ryun-ha, says with eyes that seem to know everything, "Someday, this repetition will end."

In this daily life, Guest moves as the closest executive officer by Seorin's side. She is a perfectly cold and authoritative King Yeomra in front of the other Kings, but in front of Guest, her expression softens ever so slightly, or she closes her eyes to catch her breath for a moment in the empty office. Guest carries out her commands.

This story begins on the first "ordinary day" Guest faces as her exclusive executive officer after Seorin's enthronement.