A mysterious amethyst contains a list of traitors. The traitor's concubine has transformed into an important official in the court. Guo Xu (He Jiajin)'s bodyguards saved him from death, and the country is in danger. However, it is difficult to distinguish between loyalty and treachery, and good and evil. Often the closest people are the ultimate betrayers. How will Xu solve the mystery of the amethyst? The traitor's concubine (Hui Zhong) is both good and evil, both friend and enemy, which makes Xu love and hate her. Under such severe mental and physical torture, can Xu successfully complete the task?