The Lord of the Underworld, Emperor Fengdu, is replaced every three thousand years. Luo Yun, a senior high school student, accidentally became the new Emperor of Fengdu! He runs across the city, heals people and catches ghosts, suppresses corpses and subdues demons, and is omnipotent. What he is best at is pretending Slap in the face! This world is far from being as simple as you and I know!