At the beginning of ancient times, Shushan led people into the world to fight demons, and eventually trapped the Demon Lord Chikun in the North Sea. Changfeng Wuji used his body as a formation and defeated the Demon Lord, leaving only a trace of his soul. The head of Shushan, Changmei, recast his body, and ordered his disciple Shen Yi to take him away from Shushan. Shen Xiu, who was reincarnated because of participating in the dragon-slaying battle, induced the demon dragon to awaken in order to find a chance to revive his grandfather Shen Yi, and will once again fight the demon dragon in the North Sea.