Wu Xi witnessed Empress Xiao Shufei taking over her son and patiently raising him. At the coming of age ceremony, the second prince shone brightly and was crowned crown prince, while the fourth prince was punished for wearing tattered clothes. Xiao Shufei exposed the truth of the transfer, and the Fourth Prince committed suicide in despair. Wu Xi was filled with grief and anger, but was ultimately punished by the emperor. She revealed the secret that the emperor and Xue Fei had arranged for their son to become emperor. In order to make Xue Fei's son become emperor, Li Rongjian and Xue Fei took the lead. The emperor was furious and wanted to kill Wu Xi, but found that the Imperial Guard had been replaced by the Wujia Army. After Wu Xi deposed the emperor, Empress Xue wanted to remove him, but she did not know that the crown prince was not biological. Instead, she was captured alive by the crown prince's defection and confessed to Empress Li. Wu Xi suppressed the rebellion, the crown prince handed over the jade seal, and Wu Xi finally ascended to the throne