A big country located in the center of the continent. In the harem where the emperor's concubines live, there is a girl named Maomao. She used to be a pharmacist in the flower street and is currently working in the harem. One day, she heard rumors that the emperor's children were short-lived. The two sons now are getting weaker due to illness. Out of interest, Maomao began to investigate the reason for this matter, as if to say that there could be no such curse. The beautiful eunuch, Ren Shi, arranged Maomao to be a poison taster for the emperor's favorite concubine. Although she has no interest in humans, due to her abnormal obsession with poisons and medicines, the pharmacist who grew up in the flower street was involved in various rumors and events. Beautiful roses have thorns, and women's gardens are full of poisons, and there are always rumors and conspiracies. Despite the trouble, Maomao still handles the various tasks that Ren Shi keeps pushing to her. The rare poison-loving girl is also running around in the harem today.