Liang Sanxi (Lv Xiaohe), the commander of the 9th Company stationed in Guangyuan, Sichuan, postponed his home leave for Zhao Mengsheng (Tang Guoqiang), an instructor transferred from the military political department. However, Mengsheng, who was born in a high-ranking family and could not endure hardship, planned to leave after only a few months. In 1979, Zhao's mother Wu Shuang (Liu Yansheng) learned that Mengsheng's troops were going to Vietnam to fight, and stepped up supervision of the transfer. Upon hearing this, the upright artillery platoon leader Jin Kailai (He Wei) was furious and threatened to go to Beijing to file a complaint at his own expense. The troops went to the Yunnan border, and Wu Shuang made a desperate request to the commander Lei Zhen (Tong Chao) to transfer Mengsheng back to the rear...