Hartman Wu is a seasoned sniper with the Special Duties Unit in the Hong Kong Police Force. Known for his unparalleled shooting skills and calm demeanor, he prepares his team for any dangerous mission that comes their way. Meanwhile, a former top sniper, Lincoln, is released from prison after serving a sentence for a failed mission that resulted in his team being killed. Driven by a thirst for revenge against those he believes betrayed him, Lincoln sets out to exact his form of justice, leading to a personal vendetta against Hartman.

The escalating tension between Hartman and Lincoln draws the attention of OJ, a young and talented sniper who idolizes Hartman but is increasingly swayed by Lincoln's charismatic but dangerous influence. As OJ is torn between his loyalty to the law and Lincoln's rebellious ways, the city becomes a battleground for these highly skilled snipers. High-stakes confrontations, strategic mind games, and intense shootouts ensue as Hartman fights to bring Lincoln to justice and guide OJ back to the righteous path. The story builds towards a climactic showdown where the true cost of vengeance, loyalty, and the burden of past mistakes come to light.