The King of Hell, after being trapped in reincarnation for 3,000 years, leaves the underworld in chaos, with ghost officials in deep slumber. In his final reincarnation, he lives as a struggling food delivery man, burdened by poverty and his mother's illness. Following a fatal heart attack caused by a malicious customer, he is taken back to the underworld by ghost messengers, where he regains his memories and powers as the King of Hell. Restored to his throne, he returns to the mortal realm, saves his mother, and astonishes everyone with his supernatural abilities. At an auction, he reclaims a lost artifact and subdues a demon. During the Yin-Yang Summit, he defeats powerful sect leaders, reopens the underworld, and restores balance between the realms, ultimately becoming the guardian of both the human and spiritual worlds.