Plot: Young women are often sold to work for a short time in the emperor's harem. This is the case of Maomao, a pharmacist in the red light district. She has no interest in being noticed in the palace and prefers to stay on her own, preparing medicines, studying poisons, or experimenting on herself. But when word spreads at court that the emperor's children are destined for an early death, Maomao cannot remain indifferent. As he tries to investigate, he catches the attention of a mysterious and handsome high-ranking officer. Thus began his particular career.