Ning Yuhan, a modern miracle doctor, disguised herself as a abused concubine and was forced to enter the palace draft for her sister. Faced with the desperate situation that the emperor was infertile and had no concubines to be buried, she relied on her clinical experience in "infertility" to prepare for pregnancy in the crisis-ridden harem. She worked step by step, saw through the Queen's sterilization tea, killed the nobleman who was falsely pregnant, and finally became pregnant with twins. Faced with the conspiracy of "eliminating the mother and leaving the son", Ning Yuhan borrowed the emperor's help to eradicate the family, and counterattacked from a humble position by choosing a servant to become a favored queen, taking sole control of the harem.