During the Chuigong years, an incredible serial murder case disturbed the people of Luoyang. Most of the victims were a pair of men and women. The murderer's whereabouts were elusive and there was no clue left. It was rumored that this was God's punishment for the Queen's incestuous relationship. Eunuch Cui was ordered to investigate thoroughly, but there was no result. The ministers advised Di Renjie to give it a try. Although Di Renjie had different political views from the Queen, it was related to the suffering of the people. He finally accepted the Queen's arrangement and solved the case within a time limit, otherwise he would be the "murderer" and bear the responsibility for this incident. At first, Di Renjie was asked not to leave the cell while solving the case. Di Renjie understood the Queen's intention and agreed. At the same time, he asked the Queen for two prison heads who took good care of him as helpers. Di Renjie was moved out of the original cell and imprisoned in a tower that could see the whole city of Luoyang from all sides. In the new prison, he saw the "eyes" who had been waiting for a long time - his confidant, Eunuch Cui. Di Renjie quickly restored the murder scene through the description of Cui Gonggong, and believed that this was a highly premeditated cursed serial murder case with special meaning. The victims died in the same way and the murderer used the corpse to complete a ritual that affected the fortune of others. Just when Di Renjie and Cui Gonggong failed to investigate the case, another murder occurred in Luoyang City. After verification, the man turned out to be Wang Pu, the imperial physician of the Queen Mother, and the woman was the wife of an ordinary small vendor. Di Renjie judged from the silk threads left at the scene that it was a typical Hangzhou light cicada silk. After being woven into clothes, it was like yarn, looming, and it was the favorite material of women. Just opposite the murder was the Misty Rain Pavilion, so the murderer must have a great relationship with the Misty Rain Pavilion. Cui Gonggong was going to the Misty Rain Pavilion to investigate. Before leaving, Di Renjie took out a pair of mother-and-child bells and gave one of them to Cui Gonggong. Di Renjie could sense the murder scene through the bells. Eunuch Cui came to Yanyu Pavilion and followed the clues to enter Helian Yunzhu's boudoir - Qingcheng Pavilion. He found that this place was opposite to the attic where the imperial physician Wang Pu was killed. Eunuch Cui shook the bell of the audience, and the bell in Di Renjie's hand in the tower prison also moved without wind. Helian Yunzhu lost her composure for a moment and made a strange sound. Eunuch Cui realized that there was something wrong with this room. Seeing that he was about to find the mechanism of the secret room, the boss broke in and Eunuch Cui had to give up. Eunuch Cui listed Helian Yunzhu of Qingcheng Pavilion as a key suspect.