In order to train a lackey for her brother, the emperor, the eldest princess Li Yanchu rescued Han Shu from the execution ground and trained Han Shu. When she was terminally ill, she designed her own death to make Han Shu loyal and assist Li Jie. Three years later, Li Yanchu was reborn as Xie Yugui and found out that she was poisoned when she was seriously ill. She started to investigate and was entangled with Han Shu again, whose personality had changed drastically...