During the Wu Zhou period, the family of the Imperial Censor Hu Xiande was killed, and Empress Wu Zetian ordered Di Renjie to investigate. Di Renjie's investigation found that Hu Xiande, who was originally honest and upright, mysteriously participated in a major case, which made Di Renjie suspiciousIt is noticed that this case may be a case within a single case. During the investigation process, Di Renjie constantly encountered various bizarre events, and the personnel involved in the case also died mysteriously one after another. Accompanied by the Yin soldiers demanding their lives, the case is at a loss, DiRenjie is shrouded in a huge conspiracy