The demon king who went against the sky for the first time, was besieged and fell before the last catastrophe, and his ghost fell into the cruelest hell. He has a firm heart and no regrets. Sending a sliver of his remnant soul back to the world, and passing on the memories and resentments of his previous life to Jiang An, a disciple of the Demon Sect who was in crisis. A somewhat rustic black and thin boy embarked on a legendary practice career of surmounting thorns and thorns, revitalizing demons and exterminating Dao. In the Tianhong Mountain branch of Jiuyoumen, a small border school, the elder brother Mu Zige is domineering, passionate, and serves the sword all his life; Long is wise, quick-witted, and knows the future; the third brother respects Qiuhuang, humorous, mysterious, and idealistic. However, the one who has gone the farthest and achieved the highest achievement is the one who is frugal to the point of being stingy, persistent to the point of paranoia, smart but likes to pretend to be stupid, and loves love Chongyi's junior brother will be on the shore.