The romantic Xia Zhuo (played by Li Yifeng), the second generation of fire Ouyang Jun (played by Chen Xingxu), the handsome man Lin Anbang (played by Duan Bowen), and the sloppy king Yi Zimeng (played by Dong Chunhui) are four roommates in the same university and the same dormitory. With their own different purposes, they became college students of the Rocket Army. When they first saw the troops hidden deep in the Greater Khingan Range, they felt regretful. In the days to come, Xia Zhuo and others gradually realized that in the Rocket Army, only soldiers with more than ten years are qualified to be called soldiers. Soldiers with more than 20 years are qualified to be called veterans. Those with more than 25 years are collectively called "cellars". Faced with "old veterans" with various skills and different years, the emergence of new forces and the old soldiers who are getting older and more fragrant have inevitably produced a confrontation. With the huge gap between dreams and reality and the help of veterans, they gradually understood the word "soldier" with their youth and took on the majesty of "big country trump card".