Ballad of Bones

In the early Tang Dynasty (Zhenguan period), before the Journey to the West incident occurred. The city of Chang'an is prosperous and prosperous, and ghosts and ghosts are undercurrents in the world. The heroine Ye Qingwan has grown from an innocent girl to a vengeful white-bone spirit, and the male protagonist has grown from a confused little Taoist priest to a rising star in the Taoist sect. What is the limit of evil among humans, demons and Tao?