Chris, Caroline, and Luke Johnson had a normal life until their school was put into lockdown status. Everyone thought that it was just a drill, but little did they know that bombs were being sent around the earth. Nobody knows why the bombs were sent, or even where they were sent from. As the survivors of the bomb attacks come together, something happens that no one would expect. Inside the bombs was a disease that when breathed in, destroys cells inside of your brain. This disease is also highly contagious, and turns even the most civilized of people into crazed zombies with an unquenching thirst for blood, and an undying hunger for human flesh.