It is said that thousands of years ago, the three realms of heaven and earth, humans, immortals, and demons were isolated. Until one day, the Qinglong tribe in the human world forged a sword-Longquan Sword. The Longquan Sword gathers the spiritual energy of heaven and earth and is a divine sword that can open up the three realms. Teng Zilian, the leader of the Qinglong clan, wanted to rule the three realms, so he used the Longquan Sword to open the passage of the three realms, allowing demons and immortals to roam the world, and many people lost their lives.
But he and she met and got to know each other...