The story is about the late Northern Song Dynasty, when the God of Salt in Mengzhou Province was in turmoil, and there were many unsolved cases and people were in fear. The story is about the return of Wu Song, who, after drunkenly beating Jiang Men Shen, joins hands with Shi En and Yu Lan to solve the mysterious case of the Salt God. After this battle, he finally sees through the hearts of the people and the injustice in the world and is forced to go to the Liang Shan Mountain

Grandmaster of Heaven is traditional name for immortal villain Tongtian Jiaozhu from Taoist legends. The Tang Dynasty emperor engages a famous detective, when he hears a political rumor about a plot to stage a coup and replace the sitting empress.

A year ago, Yan Chixia, alongside her family, killed the Fox Demon. Her younger sister Jiang Xue, however, was turned into a demon l, and under the intervention of the sect, becomes even more involved with Yan. The deep misunderstanding brought on by Chixia causes that he has become her mortal enemy. The two are separated by two generations of enmity against the monsters. Yan Chixia becomes one who exterminates demons, while Jiang Xue quietly transforms into a nine-tailed fox known as Shen Si Rou.