Two years after the New York outbreak in Medora, masked terrorists unleash the undead at a mall in Mexico City. Infected bodies fall from unmarked planes over D.C., Seoul and Jerusalem. A terrorist leader, known only as The Sirr, claims responsibility as he rises up with his brotherhood to cleanse mankind with the nanovirus scourge. The fate of the world depends on an elite infectious operations team and one CIA operative whose loyalties have blurred. As the military defends the world with electromagnetic weapons, they soon discover the enemy’s secret: the undead have evolved.