Li Yunlong (played by Li Youbin), the head of the independent regiment of the 386th Brigade of the 129th Division, is a young man who dares to think and do things without following the rules. He has a hot temper and a straightforward personality. Under his leadership, the entire independent regiment also showed a courage to fight for his life. In front of him, the arrogant Sakata Company, Yamazaki Battalion, and Yamamoto Unit were defeated one after another. Li Yunlong became famous, but was also reprimanded for repeated violations. During the Anti-Japanese War, he and Chu Yunfei (played by Zhang Guangbei), the head of the 358th Regiment of the National Army, sympathized with each other, but had to compete in the Xubang Battle, and both of them were seriously injured. During his convalescence, Li Yunlong fell in love with the kind and lovely nurse Tian Yu (played by Tong Lei), and the two revolutionary comrades came together. In the following decades, the couple, their relatives, and comrades-in-arms experienced the vicissitudes of this country together... This film is adapted from Du Liang's novel of the same name "Bright Sword".