The film is adapted from the deeds of the sharpshooters in the "cold gun and cold cannon" campaign during the War to Resist U.S. Aggression and Aid Korea. From the winter of 1952 to the beginning of 1953, the Chinese People's Volunteer Army and the United Nations Army formed a stalemate on the Korean battlefield. Both sides launched a low-intensity intensive sniper war, known as the "cold gun and cold cannon campaign". The sniper squad 5 soldiers led by the company commander (played by Zhang Yi) have excellent marksmanship and have become a major concern for the enemy. Squad leader Liu Wenwu (played by Zhang Yu) has become a key sniper target. In order to severely damage the sniper squad 5, the enemy deployed an elite sniper team equipped with the most advanced weapons and equipment, and forced the sniper squad 5 soldiers Dayong (played by Chen Yongsheng) and others to enter the dangerous place they set up to save their companions. But just as the enemy was making their wishful thinking, they did not expect that the scout Liangliang (played by Liu Yitie) who was used as bait by them actually hid a bigger secret...