Champion competitive marksman Ken Kwan (Louis Koo) kicks off his journey by finishing an IPSC competition when he unexpectedly witnesses an armored van robbery. Amid this chaos, he spots a policeman being held hostage and takes swift action, using his race gun to eliminate four of the robbers. However, the ordeal takes a grim turn as one robber escapes and the policeman is left in a coma. The case gets handed over to Inspector Jerry Chong (Daniel Wu), who happens to be an acquaintance of Ken, having recently lost to him in a shooting match. In a surprising verdict, Ken is found not guilty in court, yet his troubles are far from over.
Shortly thereafter, Ken finds himself under attack from the escaped robber Pang To (Chapman To Man-Chat). This encounter exposes a tangled web of deceit, manipulations, and shifting alliances as both Jerry and Ken attempt to outmaneuver one another. It soon becomes evident that Pang had been in cahoots with Ken, concocting a plan to rob the very armored truck Ken now finds himself embroiled in. Compounding matters is Ken's secret affair with his boss, Anna Shaw (Li Bingbing), which adds strain to his marriage with Ting (Charlene Choi).
As Ken navigates this maze of lies, disaster strikes when their plan goes off the rails. The tension escalates when their inside man, Mr. Fong (Lam Suet), is killed during the robbery, sending shockwaves through their operation. To complicate their situation even further, the traffic cop Billy Tsui (Andrew Lin Hoi), who witnessed the robbery try to intervene, is now in a coma, which poses a serious threat to their plans. In a desperate bid, Pang suggests eliminating Billy to secure their safety, but when he attempts to carry out this proposal at the hospital, he fails and is left no choice but to escape.
In a pivotal moment, Ken decides to take matters into his own hands and executes Pang, all while pretending to assist him in fleeing with the money. This drastic action is born from a heated argument where Pang threatens to expose Ken’s illicit activities in court, alongside harming Ting and Anna. Meanwhile, Jerry is caught in a psychological battle, struggling to gather evidence against Ken. Despite being a skilled inspector, his defeat in the shooting competition weighs heavily on him, causing him to question his own instincts and judgment regarding Ken's involvement.
As tensions heighten, Jerry consults Mew Sir (Alex Fong Chung-Sun), who advises him to let go of his past loss to Ken, stating that his obsession is clouding his ability to suspect Ken meaningfully. Inspired by this counsel, Jerry devises a plan to draw Ken out. He instructs Ting to falsely announce that Billy is waking up, hoping this would prompt Ken to return to the hospital for a final confrontation. The plot becomes even more convoluted when Ting learns that Billy's family had already consented to disconnect him from life support.
In a climactic scene filled with suspense, Jerry sets the stage for an ultimate showdown. They engage in a tense shootout, where Ken deliberately injures Jerry in an attempt to regain some measure of control. However, Ken's denial of defeat leads him to make one final, reckless move, aiming for his gun despite the encroaching presence of Ting and the police surrounding him. In a heart-wrenching moment, he meets his end at the hands of Billy's brother Warren Tsui (Andrew Lin Hoi), leaving Ting devastated by the loss.
As the dust settles, Billy is laid to rest, and Jerry finds a bittersweet solace in proving himself victorious over Ken, culminating in a moment of reflection with his friend Milo, symbolizing the complex nature of victory and loss intertwined in their lives.
