Korean War, winter 1950. In the frozen and snowy area of Changjin Lake, a bloody battle is about to begin between the elite troops of the United States and China.
Commander Wu Qianli leads the 7th Infantry Company soldiers to Funchilin Pass where they are tasked to destroy a bridge to stop enemy troops from retreating.
In 1945, Harbin has come under the rule of Japan's puppet state known as Manchukuo. Communist agent Song Zhuo Wen successfully infiltrates Harbin Secret Service where Guan Xue holds a post as the chief of special police.
