The Strange Case of Bingwu

On the sixteenth day of the first lunar month of the Bingwu year of the Great Zhao Dynasty, wealthy businessman Zhao Tiande was found dead in his study room with a ruby-encrusted dagger stuck in his chest. The doors and windows at the scene were locked from the inside, forming a "secret room". Next to the body was a tuft of rare red fox hair. The apparent cause of death was a stab wound, but Su Xiaoxiao's autopsy found that the deceased had "Zuixin Powder" poison in his body, and the time of death was actually an hour before the secret room was formed. Lu Mingyuan, the "cold-faced chief" of the Criminal Department, is good at observing minute details. Due to a slight lameness in his left leg due to an old case, he changed from a rational person who only believed in physical evidence to understanding the complexity of human nature. Su Xiaoxiao, the daughter of Yi Zhuang's widow, is proficient in autopsy and pharmacology. She is soft on the outside but strong on the inside. She is eager to get rid of status prejudice and prove her ability.