At the entrance of Lancheng Military Police, Shen Hengzhi bent down to light a cigarette for a Japanese officer. On the rooftop in the distance, Lu Huaifeng's gun was pointed at the back of his head. Three years ago, they were brothers who slept in bunk beds and swore an oath together under the party flag. Now one is the deputy chief of the "traitor" intelligence section, and the other is the base area anti-traitor team leader. Shen Hengzhi couldn't explain it - he died on the line, the contact code was invalid, and there was only one sentence sent back from Qinghe: Shen Hengzhi had rebelled. He can only continue to act as a lackey in the eyes of the enemy, using his intelligence analysis capabilities to predict every raid route by the Japanese army, and then deliver the intelligence in the most dangerous way. Lu Huaifeng followed him for seven days and saw with his own eyes that he was drinking with the puppet soldiers, giving women to the gendarmerie, and personally arresting the base traffic officer. "Next time we meet, I will kill him with my own hands." Lu Huaifeng swore to his comrades. But when the Japanese army's encirclement tightened and the base area fell into a desperate situation, Shen Hengzhi broke into the ambush alone and thrust a piece of blood-stained intelligence into Lu Huaifeng's hands. The brothers reunited, but they used guns against guns. He said: "Shoot. But after shooting, take the information away."