Ling Jing (Huang Xiaoming) has been the top marksman of the Hong Kong Police Sniper Team for four consecutive years. His superiors and teammates have praised him, but he is very self-righteous and doesn't like to deal with others. His only happiness is the company of his wife. During an anti-bandit operation, Ling Jing accidentally killed the hostage - the only son of the richest man in the city. The rich businessman continued to put pressure on the police department, and finally Ling Jing was sentenced to four years in prison for manslaughter. Since Ling Jing left, Ke Ming (Ren Xianqi), who was originally the second in the police force, has become the strongest one. It was he who made false evidence that put Ling Jing in prison. Ling Jing vowed to take revenge on the police force and Ke Ming who betrayed him. O Zai (Edison Chen) is a top student in the police academy. He has excellent marksmanship and first-class gun skills. He was soon recruited by Ke Ming to join the Hong Kong Police Sniper Team. After hearing about Ling Jing's story, he became curious about him. By chance, he met Ling Jing and got guidance and became friends. Ling Jing frequently provoked the police force, which led to the entire sniper team to hunt him down. Ling Jing fights desperately and fights the police alone. Unexpectedly, Ke Ming uses himself as bait, and with the help of O Zai, he accidentally exposes his position. In the end, which side will win? And can Ling Jing get the fairness he deserves?