The cold-faced forensic doctor Shen Zhihan was falsely accused of parricide. Within three days, he was despised by the court and the execution ground was imminent. The former female catcher Gu Zhaoxue secretly investigated the case despite the ban. The ink stains of Liu Ruyan, the young master of the medicine hall, the poison sac of Qin Shisan, the black market shopkeeper, and the blood sample of the imperial doctor Bai Tang, all became the puzzle pieces for him to reverse his destiny. When the truth pierced the official robe, he nailed the real murderer to the execution ground with his own hands, but he didn't know that his mother's death was just the prelude to the royal family's murder case...
