A hundred years ago, in a war between the immortals and the devils, the ancestor of the Immortal Sword Sect fought for seven days and seven nights against the leader of the devilish race, the Emperor You, and ended up in a terrible defeat. A hundred years later, Zhang Zhilin becomes the new head of the Immortal Sword Sect and uses the Purple and Green Swords, which can kill the Demon King, as bait to lure the Emperor to show himself.
Di Renjie's first appointment as the emperor of Dali Temple during Tang Gaozong's reign. During the period, many troll murders occurred in the imperial capital Chang'an. At the beginning, Di Renjie didn't believe it at all, but some people alive saw the trolls and caused a series of bizarre cases.