Gao Deng (played by Zhang Bo) is a new recruit who has just joined the army. He has an arrogant and unruly personality. After the end of the recruit company, he was assigned to the weapons repair class by his leader. Veteran Lin Feng (played by Xing Jiadong) is the technical veteran of the repair class. He has unique skills and is well hidden. When Gao Deng first came, he was incompatible with him and was passive at work, but Lin Feng's unique skills made Gao Deng look at him with admiration, and soon the two of them went from tit-for-tat to sympathetic. The repair class is located in the mountains on the border. In the early years, many mines were laid due to the war, posing a serious threat to the lives and safety of local border residents. The troops were preparing to organize a mine-sweeping operation, and the master and apprentice signed up for the mine-sweeping team and made great contributions to the operation. Afterwards, the two joined the military region's boundary survey and mine-sweeping brigade, responsible for the clearance of residual mines on the Chinese side of the border. This task was both difficult and dangerous. In a pursuit mission that mistakenly entered a thunder mound, Lin Feng left death to himself...