In the third year of Yongle, Nanjing City. A massacre burned down the last light of the widowed Shen family. Shen Qian stood in the ashes, looking at his hands that were used to holding knives and examining bones, and thought of his twenty-year career as a forensic doctor in his previous life. She put on men's clothes, changed her name to "Shen Qian", and entered the most dangerous place - Jinyiwei. For the next nineteen years, she examined corpses, investigated poisonings, solved strange cases, and turned every death inside out. She never wanted to be seen through. Gu Yan stood like that in the moonlight and said calmly: "Your bone examination method is exactly the same as that of the Shen family." She did not defend herself, but just put her hand on the handle of the knife. He said calmly: "I buried that skeleton for you. Let's investigate the Shen family's case together." She let go of the knife.
