When an extra-terrestrial pod lands in Hong Kong the human transformations begin. With seemingly no way of detection, the population is being infected by an alien virus, which transforms them into a modified human species. Sergeant Dave Chan and Hong Kong security forces are left to deal with the problem, whilst everyone lives in fear and paranoia. In an effort to contain the transformations, Hong Kong's borders are closed, while regular citizens quickly have to confront a fight-or-flight scenario. The rules of survival have changed. To remain human is to live in fear.