Jong-gyu, an exorcist, faces off against the nine-tailed fox monsters that seduce people in a brothel and take their lives. Some of them escape and annihilate his wife and village. Enraged, Jong-gyu engages in a decisive battle, but is pushed back by the monsters, and a white hermit helps him. The sage hands Jong-gyu the sword of demon slayer and tells him to train so that the sword can show its true value and disappears. Jong-gyu, an exorcist who lost everything, searches for the king of monsters, fights a tough battle, and finally faces the final showdown with the great demon king of the underworld.
Before joining the imperial court a young Di Renjie was a minor judge in Bianzhou. When his mentor Yan Liben was welcoming Empress Wu back to the imperial court from the Ganye Temple, he encountered a strange ghostly incident called "Qingji". Master Yan was wrongly accused of being the murderer who intended to kill Empress and was jailed. To unravel the mystery, Dee comes to Chang'an alone, and with the help of his lover Gongsun Yu and his friend Yang Lu, a small-time gangster in Chang'an, he solves the "Qing Ji" murder case
The tomb of Yan Dong, the former head of the Six Horsemen Division in Chang'an, is hit by tomb robbers and the Xuanmao pearl, which was used to suppress the demon king, is stolen, leading to the rise of demons in Chang'an City and the unrest of the people. The Chief Steward, Eunuch Fish (Luo Jiaying), orders Ma San (Wu Mengda), Wang Zhuge (Jia Bing) and Lei Yan (Xu Dongdong) of the Six Horsemen Division to suppress the demons and hunt for the pearl, and to hatch a terrifying plot.