The Si family was wrongfully accused of treason and beheaded in public. Si Zhaozhao went to the palace to ask for help from his sister who was serving as Jieyu in the palace, but he saw his sister being poisoned. After his sister died, Si Zhaozhao vowed to avenge his family. Taking her sister's place, she worked step by step and planned to get close to the emperor to gain his favor. Lu Xuanyu, the chief minister of the dynasty, helped her get revenge while secretly having sex with her. Unexpectedly, Si Zhaozhao's identity was suspected by the Ye family, and her relationship with Lu Xuanyu was also exploited by someone with ulterior motives. In this harem, which is on thin ice, she tried her best to eradicate Concubine Ye Guifei, the murderer of her sister, but found that there was another hidden truth behind the Si family's destruction.
