Humankind faces extinction from hordes of monsters... but their greatest threat is themselves.The world ended 500 years ago. Strange, zombie-like creatures known as the infected have taken over the Earth. Only four pockets of civilization exist, protected by advanced technology that prevent the infected from infiltrating their cities.When one of the barriers collapses, though, and the infected surge into an area of the city, the protagonist must not only survive, but save the city from ruin.As information is revealed, they learn that a much greater and more sinister plot is being hatched.