In the twelfth year of Tianbao, the time for the resurrection of the demon is approaching. The demon king Xieyu intends to use the demon to lead the demon clan and subvert the human world, making the human world a place for the demon clan. The human exorcist department summoned young talents to return to Chang'an to prepare for the appearance of the demon four years later. At the border, the people of the exorcist department gathered again and later discovered the riot of the dead ghosts. Behind all this seems to be related to the legendary white deer. Where is the white deer?