The Viral Factor, an Emperor Motion Pictures production with a US$17 million budget, filmed in locations in China, the Middle East and Southeast Asia using real military weapons, bursts onto cinema screens in January 2012! The action-packed adventure is directed by award-winner Dante Lam (The Beast Stalker, The Stool Pigeon), and stars award-winning actor Nicholas Tse and Asian superstar Jay Chou.
IDC Agent Jon (Jay Chou) sustains grave injuries on a mission and decides to spend his final days with his mother. She tells him a long-held secret. To fulfill her wishes, Jon goes to Southeast Asia. He befriends medical specialist Rachel (Lin Peng). When she is forced into the schemes of a criminal organization, Jon attempts rescue and becomes the target of the organization that includes his estranged brother Yeung (Nicholas Tse)! When the organization betrays Yeung and kidnaps his daughter Sheng, the brothers join forces to rescue Rachel and Sheng.