In the 1940s, the Battle of Zhongtiao Mountain in Shaanxi was fought very tragically, and many people lost their lives because of it. Dalin's troops Almost the entire army was annihilated, and no one survived. Dalin was the only survivor. He escaped from death, but was killed by the enemy. His closest comrade-in-arms made him very sad. With a feeling of self-blame, he went to Peiping to find the widow of his comrade-in-arms, but at this time, Peiping had already been invaded by Japan and was deeply under Japanese rule. Rescue, the two of them have been together for a while. After a period of time, he formed an indissoluble bond with this kind lady. In a restaurant in Peking, Olin, who was helping the cook, was very clever, but he was unwilling to participate. Then he was spotted by the underground party organization, and soon the revolutionary ideal in his heart was ignited, so he became an intelligence agent in the underground party