Who is Gao Fei? Who is Gao Zhenlin? Which one is the "ancient city"? When the country is in crisis, a group of souls with patriotic obsessions walk on the tip of the knife, in the dark, just so that more people can live happily under the sun. They test each other and suspect each other. It is not until the moment of victory that they know whether they are on the same journey.
Concept: The whole process of a willful killer growing into an outstanding communist fighter
