Wu Xie, Zhang Qiling and Wang Pangzi continued their adventures to ghost kingdom of the snakes. In order to help Zhang Qiling regain his memory, they look for the clues in Guangxi border, re-encountering the dangerous situation once again. They discovered a mysterious lake which located the ancient Yao village underwater, where it was said that the lake holds terrifying rumors among the local villagers due to a strange incident that occurred nearby. In the end, they managed to arrive at the Zhang family mansion which was their final destination, where the mystery behind all of this was eventually be revealed one by one.
After Wu Xie found a painting of young man in the post office at Medog County and returned from Nepal, his peaceful life was interrupted again by the sudden visit of Jin Wantang. He brought a scorpion-shaped pendant from the Zhang family ancient mansion, which was closely related to Zhang Qiling in his childhood. In pursuit of clues, Wu Xie went to Nepal again and then moved to Medog. In Medog, all kinds of clues related to Zhang Qiling are coming. Wu Xie realized that he came to Medog and found that it was not accidental, but it was planned by someone. Wu Xie and Wang Pangzi find out more about Zhang Qiling's background and the mystery behind Zhang family.
The story of Wu Xie, Zhang Qi Ling and Wang Pang Zi who join forces again after a ten-year hiatus to go on an adventure. A text from Wu Sanxing drives the iron triangle trio to embark on a mysterious journey once again for the sake of family and friendship.