Ran Chen, a prodigy from the provincial Frisbee shooting team, lost his ticket to the national team just for a butter hot pot, and was forced into the army by his parents both forcefully and forcefully, with the small plan of "retiring after serving two years." Unexpectedly, on the first day of the new recruit company, he met Xu Nan, the worst squad leader in the entire squadron. Shenlong never saw the end, and his training relied entirely on his own consciousness. When something happened, he would only say "find your own solution." The third squad even gathered a group of "problem soldiers": a fat computer guy who was deceived, a drone master who refused to admit defeat, and a taciturn orphan engineer... But when bullets flew past his ears, when the careless boy in the past raised his gun, and when the squad leader's special operations badge flashed coldly in the sun, Ran Chen understood: some missions, once shouldered, can never be let go. From then on, there was a group of top soldiers who guarded the defense line with their lives in the thousands of miles of East China Sea.