On a spring day, while natural disasters rock the globe, almost two billion children disappear from the face of the earth. Of the few who remain, most are ravaged with a plague that turns them into mindless, murderous beings. The residents of Haven prepare for what they believe is the final battle against the Sleepers. Instead of running, they stand their ground and launch a huge offensive. The only problem they face is who–or what–will they be actually battling?