1938年，武汉沦陷前夕，传奇狙击手左英杰率小队拼死阻击，一战成名。不料事后却遭小人构陷含冤入狱，女特工沈雪在狱中找到昔日战场英雄并授予一项绝密刺杀任务。左英杰临危受命，不料行动伊始便遭遇宿敌日军王牌狙击手下川国正伏击，身陷险境。惊天阴谋逐渐浮出水面，国恨家仇、狭路相逢，巅峰对决一触即发……

Zuo Yingjie, a decorated sniper, is put in prison by a false accusation, where he receives a top-secret mission from a female agent Shen Xue of assassinating a Japanese bacteriologist Kitano Seichyo. But a traitor sells him out, leaving him in grave danger against his mortal enemy Shitagawa Kunimasa, an ace marksman of the Japanese. Some conspiracies are found. The revenge for the country and nation begins…