Su Ningshuang, a maid in the cold palace, originally wanted to wait until she was old enough to leave the palace and get married to her childhood sweetheart Shen Zhiyan. However, she unexpectedly reunited on the eve of leaving the palace. Her former lover's family was ruined, and she reluctantly entered the palace to take revenge.
She resolutely gave up her freedom and stayed in the deep palace to work every step of the way. From an inconspicuous palace maid to a powerful female official in front of the emperor, she became close friends with the imperial concubine and secretly supported Shen Zhiyan to gain a foothold in the palace. The two teamed up to investigate and eventually brought down the Queen's mother's family who had framed the Shen family, but they were shocked to find that the real culprit behind the scenes was the emperor.
In a bloody feud, the two instigated the Shen family's old tribe to launch a palace coup and subvert the imperial power. The concubine who once loved her sisters turned against her and was killed, the emperor was humiliated and turned into a eunuch, and his children suffered the same fate as the Shen family.
Shen Zhiyan supported Su Ningshuang as the queen on the grounds of her disability, and granted her the title of Nine Thousand Years Old Assistant, leaving her with only the protection of a brother and sister. Su Ningshuang later fell in love with her male favorite and had children, and finally gave up her imperial power and retired to the south of the Yangtze River, fulfilling her youthful wish. However, Shen Zhiyan was trapped in the court all his life, died alone, and was buried within the palace walls.
All the members are in deep love and hate each other. It seems that the heroine is perfect, but in fact, all members are tragic, leaving endless regrets within the palace walls.
