Sam Shia Wai-Sum

In the late 21st century, a subculture of humans have emerged who have been modified genetically by a vampire-like disease, giving them enhanced speed, incredible stamina and acute intelligence. As they are set apart from "normal" and "healthy" humans, the world is pushed to the brink of worldwide civil war aimed at the destruction of the "diseased" population. In the middle of this crossed-fire is - an infected woman - Ultraviolet, who finds herself protecting a nine-year-old boy who has been marked for death by the human government as he is believed to be a threat to humans.

Agent Lam (Tony Leung) sets out to track a pair of plates used to make fake American dollars. When he discovers the plates, they are conned out of him by enigmatic US Embassy workers Owen (Richie Ren) and JJ (Shu Qi). With the trail now leading to Korea, Lam sets off in hot pursuit. There, amidst the dangerous and glamorous urban landscape of Seoul, Lam finds himself confronting an underworld crime boss known as the Polar Bear, head of the biggest counterfeiting organisation in Asia.

Two warriors in pursuit of a stolen sword and a notorious fugitive are led to an impetuous, physically-skilled, teenage nobleman's daughter, who is at a crossroads in her life.