Su Ruotang, the most unpopular concubine in the Su Mansion in Kyoto, was sent to the palace as a maid as a "substitute chess piece" because her sister Su Ruoyao was selected as the crown prince's concubine. Relying on her exquisite skills and photographic memory developed during the house fight, she rose step by step from the maid in charge to the official in charge. During this period, she was repeatedly framed by concubines and suppressed by her sister-in-law, but she resolved the crisis with ingenuity: she used improved candied fruit to please the queen mother, she used poetry to win back the sacred heart of a disgraced concubine, and she used the chess game in the imperial garden to alert the emperor to hidden dangers in the court situation. He and the third prince Xiao Chengyu, who was hiding in the palace to observe the throne, went from testing each other to secretly forming an alliance. In the end, in the turbulent palace battle, they helped Xiao Chengyu ascend to the throne of God. The most exciting points of the whole drama are focused on "fighting against adversity" (such as being slandered and falsely accusing the other party of stealing fragrance, being pushed into the water and grabbing the other party's excuses) and "escalation of wits" (from dealing with the palace concubine to balancing the imperial concubine and intervening in the previous dynasty).
