The Viral Factor

The Viral Factor is a 2012 Hong KongChinese action film directed by Dante Lam and starring Jay Chou and Nicholas Tse. The supporting cast includes Lin Peng, Michelle Bai, Andy On, Carl Ng, Liu Kaichi and Elaine Jin, with action direction by Chin Karlok. Production for the film started in March 2011, and was theatrically released in January 17, 2012.

In Malaysian court, Man Yeung is being charged for numerous crimes that he had committed. While being escorted to the prison, he attacks the police personnel and makes a successful escape. He later meets up with corrupt police officer Russell, who aided in his escape from custody and was given a new job. On his flight to Malaysia, Jon meets Asian Centre for Disease Control and Prevention ACDC doctor Rachel Kan Lin Peng, who was later abducted by Yeung after the plane landed. A suspicious Jon, who noticed that the car that Rachel was travelling in has a different driver from earlier, tails the vehicle and ended up being forced into the vehicle. Jon, unaware of Yeungs identity, puts up a fight against him and the other henchmen, causing the car to crash. Yeung escapes after a brief struggle with Jon. Later, Jon meets his father and Mans daughter, Cheungsing, who shows him a newspaper article that the man he encountered earlier was his brother.Meanwhile, Yeung and his goons breaks into Rachels house, who holds her mother hostage and forces her to get a Carnot virus sample from the ACDC headquarters. The next day, while Yeung and Rachel are leaving the building after obtaining the virus sample, a security personnel triggers the alarm, causing a chase through the city. Yeung crashes the getaway vehicle and flees on foot. He calls his father and tells him to bring Cheungaing to meet him at the train station. Jon, who was nearby to meet up with Rachel, witnesses the event and join in the pursuit of Yeung. Working together, Jon and Yeung managed to hold off the corrupted police officers long enough for them to board a train to escape. Jon persuades Yeung to surrender himself but the two brothers got embroiled in a fist fight. They were later intercepted by the at a train depot, where Tin sacrifices himself in order to let Yeung and Cheungaing escape, but Cheungaing was caught by a henchman and Jon arrested by the police. Russell then discovers that Jon and Yeung are brothe

Source: Wikipedia