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.