Kai-tat, a ruthless, deeply disturbed, and hyperactive gangster operating in 1990s Hong Kong, is forced to flee to South Africa after murdering his boss and the man's wife. Taking on a new identity, Kai-tat settles into a quiet life working at a
Chinese restaurant owned by a kind-hearted local family. However, his sociopathic nature remains unchecked. After ruthlessly murdering a local shopkeeper and her husband during a botched robbery, Kai-tat rapes a young, unconscious native woman who wanders into the ransacked home.Unbeknownst to him, the woman is dying of the deadly Ebola virus. Kai-tat contracts the disease, yet miraculously becomes an asymptomatic carrier. While he experiences no symptoms, his body is teeming with the lethal pathogen, transforming him into a walking
biological weapon. Realizing his condition after the woman dies and health officials quarantine the area, Kai-tat feels invincible and decides to return to Hong Kong to settle old scores and spread absolute chaos.Upon his arrival, he wastes no time unleashing carnage. Kai-tat visits the restaurant of his former boss, whom he previously murdered, and begins working there again under a fake persona. Driven by pure malice, sadism, and a desire for domination, he secretly butchers the restaurant's remaining staff and owners, cooks their flesh into inexpensive pork buns, and feeds the gruesome meals to unsuspecting customers and local triads. As the body count rises, health authorities and police are baffled by a sudden, aggressive outbreak of Ebola in the city, tracing the bizarre transmission vectors back to Kai-tat's chaotic path of destruction.Kai-tat’s reckless rampage escalates as he infects prostitutes, rivals, and anyone who crosses him through intimate contact or violence. The police, led by a relentless detective, slowly close in as the city descends into a state of panic over the mysterious epidemic. Unfazed by the closing net, Kai-tat revels in his notoriety and power, embracing his role as a plague-bringer.The climax arrives when police finally corner Kai-tat at the restaurant. In a frenzied, chaotic shootout and violent brawl, he is mortally wounded and trapped. As the building catches fire, Kai-tat refuses to surrender, howling with psychotic laughter as he burns alive, finally ending his reign of terror while the lethal virus is seemingly incinerated with him, leaving the surviving authorities and a terrified city to grapple with the unimaginable horrors he wrought.