Claire investigates the house of the last survivor of the Mad Dogs besides Jason, but he has already killed himself. It is revealed that the unit's soldiers were infected during their mission in Penamstan. Meanwhile, Leon follows Shen May to her grandfather's home. After he forces his way in, it is revealed that Shen May's brother was the soldier that was saved by the Mad Dogs, but he was already infected with the virus and turned when the Mad Dogs brought him back to base. Shen May's grandfather later brought him to China and the Mad Dogs worked as Wilson's private military force to keep being supplied with medication to stop their own infection from breaking out...