After the Battle of Sanchuankou in Song and Xia Dynasties, the eunuch Huang Dehe fled back and brought back evidence to sue the coach Liu Ping and others for surrendering to the enemy before the battle, resulting in the Song army being almost wiped out. While Song Renzong detained all the family members of the soldiers in Beijing and prepared to be executed later in the year, Song Renzong secretly sent Wen Yanbo and Zhan Zhao to Yanzhou to investigate the actual situation of the war. Zhan Zhao and others encountered many obstacles and went through all kinds of difficulties to collect and protect evidence. . . . . .
Conception: