Fong (Richie Ren) is renowned as the top shooter in the Special Duties Unit. But behind the legend lies a skeleton in the closet: his former teammate and superb marksman Ching (Huang Xiaoming), who was jailed for accidentally killing a hostage, has just been released. With only vengeance in his mind, Ching determines to take on Ming and the police, believing they are the real culprits for his downfall.[3]

This movie starts with a scene of two rookie cops getting involved in criminal shootout. One of them is OJ, who manages to stay calm and kills a criminal. Ming sees potential in this youngster and decides to take him under his wing. Yet when OJ becomes fascinated by Ching and determines to top his shooting skills, he becomes another wild card on the loose.

When a high-security prisoner transfer is sabotaged by a mysterious sniper, and when a major convict escapes, Ming and his team are dispatched to profile the suspect. OJ (Edison Chen), the hot-headed rookie on the team, surprises everyone by accurately replicating the suspect’s impossible shots. He manages to do this because of advice from Ching.

Meanwhile, Ching continues his plan of revenge. Believing that Fong had withheld key evidence which could free him, Ching decides to lure him by ganging up with a triad leader and kills many cops, leading to the ultimate showdown amongst three expert snipers.