Shen Zhiyi, a sixteen-year-old merchant's daughter, accidentally became a draft girl. When she first entered the court, she was involved in the power vortex between the queen and the concubine. She witnessed the tragic death of the palace maid and saw the cruel truth of the harem. Shen Zhiyi was arranged to sleep with him but was drugged. The emperor was furious and demoted him to the cold palace. In the cold palace, she met Su Muyun, the imprisoned princess of the former dynasty, and received key survival guidance. Shen Zhiyi relied on the medical skills taught by Su Muyun to save the Queen Mother who suddenly fell ill, and got the opportunity to return to the harem. At the same time, she found that she was involved in a larger palace secret. Shen Zhiyi, who returned to the harem, was obedient on the surface, secretly investigated the truth, formed an alliance with the imperial physician Lin Xiuyuan, and gradually got closer to the core of power, but she did not know that a bigger conspiracy was waiting for her.
