Xiaozhuang (Gu Zhixin), who has now entered the film and television industry, has no idea that he once had such an unforgettable military memory. An accidental encounter with the former squad leader Lao Pao (Xu Jia) opened the gates of his memory again. When he was young, Xiaozhuang followed the footsteps of his girlfriend Xiaoying (Liu Xiaojie) and resolutely dropped out of school and entered the barracks. This young man with a strong personality constantly clashed with the cold and old-fashioned squad leader Lao Pao, but his excellent military literacy allowed him to be further trained and improved in the melting pot of the People's Liberation Army. After layers of trials, Xiaozhuang went from an ordinary recruit to a scout who made great contributions to the construction of a career, and then to a demanding special forces soldier. He and his companions shuttled through the rain of bullets, experiencing life and death and blood and tears, and moving forward firmly on a road that could not be turned back... This film is adapted from the online novel "Leave the Last Bullet to Me".