During WWII, a young Chinese student joins the Communist army fighting Japanese aggression. Initially struggling, he transforms into a devoted soldier defending his homeland with his comrades' support.

During the anti-Japanese war, the Communist Party of China actively fights against the Japanese aggression. A young student named Zhongxiao is rescued by the Independent Regiment of Eighth Route Army in a Japanese "mopping-up" operation, and he is allowed to stay with the army. At first, Zhongxiao could not get along with other soldiers as he always falls behind on training and his background is very distinctive. But with the help of his comrade-in-arms, he gradually transforms from a weak young man to a Chinese soldier who devotes his life to safeguarding his mother country.