In the autumn of 1950, the newly established China was undergoing great changes. Wu Qianli, the commander of the seventh reconnaissance company, returned home to visit relatives. The eldest brother of the Wu family had sacrificed in the Huaihai Campaign, and the youngest brother, Wu Wanli, was unruly and troublesome, causing harm to the fishing village neighbors. Qianli decided to take him in the right direction by joining the army. The brothers reunited in the camp just as the army was deploying to the battlefield to resist the US aggression and aid Korea. Wanli was new to the battlefield and met a group of battle-hardened veterans, each with a strong character. After crossing the Yalu River, they encountered one of the coldest winters in a century in Korea. The regiment ordered them to split into smaller units and infiltrate deep behind enemy lines. The new soldier Wanli became a burden for the seventh company on the battlefield. However, Wanli and the seventh company grew together through a series of arduous battles. During the battle at the airport, the seventh company saw through the US military’s tricks and, while saving the entire group, became separated from the main force. They searched for the main force at the Shumun Bridge. The Shumun Bridge was a decisive factor in the Korean War, and with only thirty or so soldiers left in the seventh company, they had to complete the mission of blowing up the bridge. The 'Steel Seventh Company,' through great sacrifices and a strong revolutionary will, accomplished this remarkable feat worthy of being recorded in history. Qianli sacrificed himself, and Wanli grew into a responsible soldier, committing to fulfill the promise made to his brother by restoring the 'Steel Seventh Company' with his remaining life.