The old era vanished without a trace, leaving behind countless strange and mysterious things buried deep underground. But thousands of years later, as new-era humans excavate the ruins of the old era, they gradually awaken those unfortunate things... An unknown side of the world gradually emerges—fleshy remains polluting reality, dead infants soaked in bottles, and dolls sewn from human skin... Disaster, misfortune, death, and fear gradually spread in the corners of the city. Su Bai, who has traveled through time, unexpectedly inherits the ruins of the underworld left over from the old era and becomes the only remaining Yin official starting from scratch. The reconstruction of the Yin and Yang order in this world will begin with him, a small living Yin official! (Not invincible flow, not mythology and faith flow, writing a different underworld, new author and new book, seeking support!)