Mr. Lin and Ms. Lin are the number one and number two in the field. They are neither friends nor enemies, but they ultimately join hands along with trusty assistant Le Qi as they track down an infamous thief who has stolen the 'Heavenly Emperor's Hand'. Unbeknownst to them, they become the common target in a manhunt by the European triads, the CIA and many other agencies.

When a private eye, a jilted bride and a mysterious stranger join forces to track down an elusive mobster, there's more than trouble in the air.

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.