The daughter of the chief assistant who was judged by her fortune-teller to be the evil star of "Kefu Keqin" when she was born, woke up in a coffin and was able to stand on her own feet. On the surface, she lives in the market and works as a wild doctor selling fake medicines (later turned into real medicines), but in fact, she devotes herself to studying medicine in order to change her own life. By accident, he rescued the emperor who was poisoned and visited privately in secret, and was pushed to the forefront. She used "medicine" as a blade and "medicine" as a weapon to mediate between the harem and the former dynasty: she wanted to cure the emperor's stubborn illness, extend the life of the queen mother, and give life-saving charms to powerful ministers. Her prescription is to tie up the court giants with ropes. Outsiders thought she was lucky enough to get in because of the emperor's favor, but they didn't know that every prescription in her hand was an "imperial edict" that made the powerful dare not act rashly.