During the Battle of Shangganling during the War to Resist U.S. Aggression and Aid Korea, our sniper Sun Chenghuan had excellent marksmanship and helped the troops win many victories, attracting the enemy's ace sniper to hunt him down. In order to protect his comrades, Sun Chenghuan chose to sacrifice himself and die together with the enemy sniper. The film is based on the Battle of Shangganling, and artistically recreates the war to consolidate the people's regime of New China during the War to Resist U.S. Aggression and Aid Korea, vividly telling the thrilling story of Sniper Ridge.