Alex, an I.P.A. agent, recently escaped Sector 5K in the United States. Now in a race against time, he must find the information necessary to bring down the secret government and stop the spread of an infectious disease that is turning the inhabitants of the world into the walking dead. Meeting up with two other uninfected people, Colonel Johnson and Owens, as well as a team of soldiers, Alex must find a way to escape the infected island and the walking dead that inhabit it without abandoning his mission.