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After the initial stabilization of the Houning era, the new emperor, Huo Jingheng (played by Wang Ruichang), selects a virtuous concubine and summons the younger sister of the former prime minister, Yue Chi (played by Xie Xingyang), Yue Ling'er (played by Li Zixuan), who has been missing for two years, to enter the palace. Yue Chi, deeply concerned for his sister, cannot bear to see her enter the palace and endure hardships. At the same time, due to Huo Jingheng's recent focus on former officials and matters from the previous dynasty, Yue Chi fears that Huo Jingheng may take actions to purge old officials and decides to enter the palace in his sister's place to investigate the situation. However, all of this is actually a conspiracy between Yue Ling'er and Huo Jingheng, who use the selection of a concubine as a ploy to have Yue Chi enter the palace and assist him in re-entering officialdom. Yue Chi skillfully avoids trouble in the palace using his intelligence, while Huo Jingheng, through a series of stratagems involving the neglect of the imperial uncle, gradually pushes the capable administrator Yue Chi into the position of Right Chancellor. Although the two develop a rift due to the interference of the former princess Jiang Yunqing (played by Gong Wanyi), they ultimately demonstrate mutual trust and bravery in combating the schemes of the prince of Li Guo, Yi Qingyun (played by Wang Jiahui), resolving both internal and external threats.