In 1937, the July 7 Incident broke out. Inspired by the chairman of Sichuan Province, the Sichuan Army volunteered to go out of Sichuan to fight against the Japanese. This Sichuan Army knew shame and then became brave. With the determination of "never return to Sichuan if the land is not recovered", three million warriors went to the battle, and at the cost of 600,000 casualties, they won the reputation of "no army can be formed without Sichuan". Zhang Kang, the student company commander, led his officers and soldiers to the battle with the North Column of the Sichuan Army, and fought in Shanxi, Shandong, Hubei, Hunan and other places. In major battles such as the Battle of Taierzhuang, they fought a series of thrilling and desperate battles with the Japanese army. Through the baptism of war, Zhang Kang and the Sichuan Army soldiers formed a life-and-death friendship, and his love with the female student Xia Zhiyue was also sublimated in the background of blood and fire. Although Zhang Kang's soldiers, Yang Degui, Wang Changsheng, Wu Tianlu, He Yinyang, Heiwa and others, had different backgrounds and personalities, they were inspired by the national justice and ended up in the same destination. In order to protect Zhang Kang from danger, they all sacrificed their lives, composing a moving and soul-stirring heroic hymn.