In 1953, the Korean War is entering the final stage. The People's Volunteer Army of China has launched the last major battle in Kumsong. In order to arrive at the battleground on time and deliver enough force to the Kumsong front line, the soldiers have to defend themselves against the never ending bombing of enemy bombers and race with time to repair bridges, all under the circumstance of supply shortages and inferior equipment. The rarely told history slowly unfolds.

At the Battle of Triangle Hill in October 1952, Huang's unit was tasked with destroying an enemy blockhouse.

An army officer has a chance encounter with a young soldier, the son of an old comrade in arms. The soldier tells the officer he has a sister who is also in the army. When the young soldier is killed in action, the officer visits her to pay his respects, and recognizes her as his own child, given up for adoption 18 years earlier. This presents him with a dilemma, wanting to reconnect with the only child he ever had, yet reluctant to tell her the truth about her parentage ...

(From Wikipedia)- "Battle on Shangganling Mountain follows a group of Chinese People's Volunteer Army soldiers who are holding Triangle Hill for several days against US forces. Short of both food and water, they hold their ground until the relief troops arrive. The movie portray the battle as a Chinese victory over an American invasion, and the People's Volunteer Army soldiers were shown as Chinese war heroes."

To help the Koreans against the imperialist Americans, Feng Yang, a scout for the Chinese army, must take a crack platoon to blow up the Kangping bridge in order to cut off the American retreat/reinforcement and make possible a major assault on American positions.