Song Zhaomu, the illegitimate son who was born as a clerk in the torture room of Kaifeng Prefecture, started out as a low-level clerk copying files with his photographic memory of criminal law and autopsy methods comparable to those of others. The other male protagonist, Lu Yifeng, has unique crime-solving skills and good martial arts skills, and the third male protagonist, Ye Yunxuan, has unique communication skills and network resources. The three of them cooperate with each other and have complicated emotional entanglements with each other. They were involved in more than 30 mysterious cases such as the "Dry Well Female Corpse Case", "Xiufang Poison Cake Case" and "River Transport Official Bank Robbery Case". Not only do they have to deal with pressure from their bosses and ostracism from their colleagues, but they also have to stick to the law under pressure from powerful people. Lu Yifeng has grown from a fledgling and somewhat cynical young staff member, and Ye Yunxuan has gradually grown from a young master who is good at dealing with all parties to a reliable helper in prisons. The three gradually grew from low-level figures to beings who were feared by everyone in the Kaifeng Mansion, and finally revealed the truth about Song Zhao's father's unjust death twelve years ago. They promoted the reform of the prison system as a commoner, and Song Zhao became the youngest prison judge in the Renzong Dynasty. Lu Yifeng and Ye Yunxuan also became famous in the prison circle. . .
