On Easter, a bomb explodes in a department store, while a cheating married woman and her lover are strapped with explosives inside an abandoned godown in East Kowloon. The crisis pulls in the city’s bomb disposal team, led by the skilled but weary John Wu and his best friend and roommate, Peter Chan. The two officers work in tandem to neutralize the devices, their bond tested by the high-stakes pressure and the proximity of death. That night, after the adrenaline fades, they unwind at a bar where [John Wu] loses a tense game of Jenga against a rival patron, a small moment of levity that sharpens the edge of their daily reality.
Shortly after, the pair encounters a young woman named Mary, who is being dumped by her boyfriend. They invite her to stay at their place for one night and, when she ultimately needs a safer refuge, she rents a storage room from them. The next day, a police briefing reveals a troubling pattern: the bombs recovered in recent incidents share the same model, hinting at a mad bomber who is more desperate for attention than technically proficient. The mood in the station grows tense as Peter and John start drafting a report for the Regional Crime Unit, laying out their deductive thread and the suspect’s psychological profile—an unreliable, self-abasing bomb-maker who seems to crave notoriety more than victory.
Mary, trying to find a foothold, drifts between work and small acts of faith. At Galaxy Restaurant, she faces a cruel turn when a thief steals her wallet, and in a different rhythm she befriends a group of Christians who pull her into their late-night prayers for an injured colleague in the hospital. Meanwhile, John and Peter press on with routine cases, and a new bombing at a Tsim Sha Tsui restaurant—staff involved in the incident—tests their endurance as the public increasingly looks to them for answers. After a night of chaotic revelry, Mary takes a bold step to show her gratitude by treating them to dinner, but a harsh accusation of theft from her boss leads to a fiery confrontation that ends with the trio drunkenly collapsing into sleep at home.
The tension escalates as the chief of the Regional Crime Unit decides to disband the special task force when the bomber falls quiet for a spell, despite Peter’s insistence that the danger remains imminent. The fragile ceasefire is shattered when the chief opens a mail bomb that inflicts serious injuries. In the aftermath, Mary returns from Canada and reveals she is pregnant, a revelation that unsettles John and Peter. She briefly moves in with their neighbor, Ken, whose guidance prompts her to consider staying, but a change of heart—spurred by a fellow father—draws her back toward the men who worry about her future as a family.
As if the pressure of fatherhood and unresolved feelings weren’t enough, a new threat emerges when a bomb is left on a minibus, causing the vehicle to flip. Everyone escapes except a mother and her infant, and John and Peter race to the scene to rescue the child while the mother is left behind in the chaos. Their news coverage of John’s defiant curse toward the bomber angers the unseen antagonist, who watches from a distance with growing anger. Back at the office, the team discovers that Mary is about to give birth, and the threat narrows to a single, dangerous moment: the bomber, disguised as a nurse, traps her in the X-ray room and connects a live explosive to the onset of her labor pains.
What follows is a breathless pursuit. Peter and John chase the bomber, who uses a nurse as a hostage and fires a last-ditch move that nearly ends them all. John grapples with the bomber, and the assailant is killed by a gunshot during the struggle. Peter immediately shifts to bomb-disposal duty as John helps Mary reach safety and assist in the delivery of her baby. When Mary finally gives birth to a healthy boy, Peter delicately detaches her from the bomb, and John—keeping steady pressure with his own pulse—cuts the red wire to discharge the device, saving them all from a catastrophe that would have changed their lives forever.
