The leaders of good and evil, Longmen and other sects, fought against the Kunlun peak. Twelve years later, Longmen was attacked by spiders, Langyan was poisoned, and the entire city was in danger. Fang Yuan, the leader of the Longque Guards, and Ji Xinye, the saint, went to the demon city to find the genius doctor Zhang Lianhua. The three of them faced many difficulties and successfully uncovered a conspiracy by the descendants of an alien sect to destroy the peace of the city, leading to the ultimate decisive battle with the Soul Eater.