In the autumn of the sixth year of Zhenguan, Di Hong, a death row prisoner in Dali Temple, knelt in front of the guillotine. The ghost-headed sword reflected the bronze seal characters that suddenly appeared between his eyebrows - that was the first moment when he activated the 'Prison Deduction Record'. There are two co-culprits in the Xiushifang poisoning and murder case in Xishi City. There is a twenty-year blood feud hidden in the coffin in the canal. The case of the disappearance of soldiers' pay in the frontier fortress involves corruption in three provinces... Death row prisoners use their crimes as bait to solve a case and gain insights; to solve a complex situation and add extra deductions. When the crimes of hundreds of cases were condensed into the "Grand Master of Prison", he was shocked to realize that the case of annihilation that he was framed in was just the first chess piece to reveal the secret of Xuanwu Sect!
