Chen Yanting, an angry young man of the 21st century, accidentally traveled to 1937 and took over the identity of the fallen captain of the military commander. In the mountain city of Chongqing, forces from all sides are intertwined, and there are many spies. On the surface, he is cynical, but in fact he has awakened the "Daily Three Emotions" system and received three pieces of real information every morning. Dealing with the military, the Japanese puppets, and the Central Government, every step is startling. Yao Qingwan, a female college student pretending to be a couple, is cold and smart, and they live and die together. He sent his comrades out of danger and executed traitors with his own hands. He was suffering in his heart but his faith was as strong as iron. In troubled times and crises, intelligence games, he walks on the edge of a knife, fighting for the survival of the nation.