This book takes "three years after Tianmang" as the starting point. Bao Zheng and Xiaoman have lived in seclusion in Shuangxi Town for three years. Gongsun Ce teaches in a private school in Luzhou, and Zhan Zhao travels around the world. The three of them are at peace with each other, and it seems that the time is peaceful. But a secret letter sent from the capital broke the tranquility - there were only six words in the letter: "Eight Wise Kings, in danger, come quickly." The letter was not signed, but the handwriting was. . . . . .
