Mu Tianran, 18 years old, is smart and naughty, and is also the devil of Fulu Village. By chance, Mu Tianran was able to leave his hometown, and suddenly he was like a dragon entering the sea, playing heartily. Along the way, Mu Tianran successively made friends with people, demons and monsters of different races and forces, such as Yang Renzhi, Ling Xi, Poppy, and Fang Jibai. He killed the demon snake, broke into the demon world, burned the Daming Palace, made a big fuss in the Demon Cave, and was involved in the fight between the human and demon worlds, and even became the king of the demon clan. Under Mu Tianran's disruption, the thousand-year grievances between the human and demon clans actually showed a glimmer of hope for reconciliation. Little did they know that the current situation was all calculated by those with ulterior motives. Since the day Mu Tianran was born, a conspiracy has already been unfolding around him. Eighteen years ago, an immortal was dissatisfied with the heavenly court's standing aside to watch the fight between the human and demon clans, and he spoke against the emperor of heaven and was demoted to the mortal world. The incarnation of the immortal is Mu Tianran. And this immortal is none other than the Emperor who exorcises demons, wards off evil spirits, protects the home and bestows blessings - Zhong Kui.