In 1953 the Korean War is entering the final stage. The People's Volunteer Army of China has launched its last major battle in Kumsong. In order to arrive on time and deliver enough ammo to the Kumsong front line, the soldiers have to defend themselves against the never ending bombardments of enemy bombers and race against time to repair the last bridge, all while facing supply shortages and with inferior equipment.
Ling Chao and Xiao Tu have been childhood rivals and inseparable friends since kindergarten. Despite his brilliance and perfectionism, Ling Chao always lived in the shadow of Xiao Tu in his mother’s eyes. As they grow up together, their playful rivalry turns into something more.
The story of Zhang Xiaoran during her youth at Tianbao high school with her best friends, top student Zhu Chenghai, the energetic Lin Tao, spirited Xiang Nan, and the sluggish Zhao Rui.