During the Tang Dynasty, Princess Taiping dreams of riding a "Silver Snow White Horse" in a "dreamland under the moon". Xuanji, a female diviner, interprets the dream, revealing that the white horse represents a "celestial horse", making the princess's dream a reality. Meanwhile, the renowned detective Di Renjie solves a "massacre case", which turns out to be a tragic event caused by the "celestial horse".
Near a remote town, the repeated dumping of toxic waste causes an underground cave dweller to mutate into a hideous monster. A construction team that is digging a tunnel accidentally disturb the creature's habitat causing it to attack.
Huang Shen, Lin Wei and a group of their coworkers went to Mangshan to find news to save the newspaper company they work for, from bankruptcy. Instead of the news they encountered a giant snake raised by Aunt Mei. The group was attacked several times, but were also rescued by a mysterious person, and then lured to a foggy forest which they can't escape. Huang Shen must do his best to help everyone survive and defeat the snake.
The Tang Dynasty is in danger, Wu Zetian is the emperor, the dynasty is in turmoil, the fox demon is out at night, rumors abound, millions of silver money is missing, the conspiracy behind is the collusion of powerful ministers, or ghosts are running rampant.