During the reign of Emperor Gaozong of Tang Dynasty, Yan Liben encountered Di Renjie (played by Ren Jialun) who was wrongfully imprisoned. After helping him save himself, he found that he was a genius in solving cases. It happened that the emperor sent him to Ganye Temple to investigate a case, so he decided to take Di Renjie with him. In Ganye Temple, Di Renjie solved a strange case, resolved a Buddhist catastrophe, and became attached to Wu Meiniang. Di Renjie made a name for himself and was sent to Bingzhou by the emperor. During this period, he repeatedly solved strange cases and was called a divine judge. There were cases of murders by ghost soldiers of the previous dynasty. Di Renjie went to check and found that it was related to the treasure of the previous dynasty and the intention of Pu Wang Li Tai to rebel, but the evidence was destroyed and he could not continue. At this time, Wu Meiniang killed her own daughter and blamed Queen Wang. The emperor summoned Di Renjie back to Chang'an to investigate. Based on the clues provided by Wu Meiniang, Di Renjie solved the case and found the treasure of the previous dynasty in Li Tai's residence, which became the solid evidence of Pu Wang's rebellion. Di Renjie also knew that the person who helped him solve the case every time he encountered a bottleneck was Wu Meiniang. He felt that Wu Meiniang was unfathomable and her ambition was beyond his imagination. Not long after, Emperor Gaozong of Tang had a stroke and asked Wu Meiniang to attend the court together, which was called the Two Saints.