In order to avenge her parents, Nan Jin, a slave in Zhenguo's palace, endured the humiliation and went to the palace on her sister's behalf. She does not have a distinguished family background, nor is she gentle and courteous, but she is full of wisdom and unparalleled elegance, and she works every step within the red wall. Facing the icy emperor Shen Yanci, she used herself as bait to stir up a pool of spring water with her sincerity and power. She counterattacked from a humble palace maid to the emperor's favorite. In the end, she paid off her blood debt and climbed to the sky, becoming the head of the harem. This is not only a counterattack feast of revenge, but also a legend of a woman breaking free from the shackles of fate and blooming in a desperate situation.