On a warm Northern Kentucky summer night, Isaac Gray, a compassionate yogi and competent martial artist, undergoes a frightening but magical experience. During a spontaneous bout of enlightenment, he has symbolic visions that the world will soon fall into darkness. The next day, a mysterious terrorist organization mounts the largest coordinated attack ever seen. The attack destroys most forms of organization and government, blocks out the sun with a black gaseous cloud, and plagues the world with a black rain that turns humans into zombies-like creatures. Because Isaac is forewarned and the attack is centered on major metropolitan areas, he and his companions survive the assault. In order to survive in this hellish landscape, Isaac, a once nonviolent person, is forced to step out of his tranquil lifestyle into the role of a hardened fighter and leader. Led by Isaac, he and his crew are forced to scavenge whatever materials they can find to stay alive against the "Infected".