When she woke up, she was in a gloomy Yizhuang. She relied on her professional forensic knowledge to see through the "suicide" scene faked by the county magistrate, and rescued the wrongly accused scholar, but it also led to a murder. At the critical moment, she was rescued by Pei Jingheng, the Minister of Justice who was passing by. This cold-faced powerful minister was investigating a serial murder case and was shocked by Su Zhi's advanced autopsy techniques, so he took her with him on the pretext of "helping solve the case."