When Shengyuan (Jin Dongxu Dong-wook Kim) was still the son of the world, he fell in love at first sight when he met his daughter Hua Yan (Zhao Ruzhen Yeo-Jeong Jo) in the minister Shen Shen's family. But her mother promised Hua Yan to her half-brother as queen for her own political ambitions, so Shengyuan went far away. Hua Yan and her family servant Human Rights Yuk (Jin Minjun Min-jun Kim) are lovers who inadvertently know that they are going to enter the palace as a concubine, so they elope but are caught by their father, and have no choice but to enter the palace in order to save their lives. Five years later, his Royal Highness was seriously ill. Under the plot and arrangement of his mother, King Shengyuan returned to the palace and became a puppet emperor. Huayan's father was also persecuted by his mother in the coup and was executed. At this time, King Shengyuan met Huayan, who had become an imperial sister-in-law, and the bondage of power burned the taboo desire in his heart. On the other hand, the domestic slave Quan, who saved his life, was castrated after he failed to elope. In order to get to the pinnacle of power, he went to the palace to be a Chamberlain and endured humiliation. With the court struggle as the background, the destinies of the three are intertwined, brewing a tragedy under the conflict between lust and power, passion and hatred.
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