A deadly purple vapor passes over the world and annihilates all living creatures except one man, Adam Jeffson. He embarks on an epic journey across a silent and devastated planet, an apocalyptic Robinson Crusoe putting together the semblance of a normal life from the flotsam and jetsam of his former existence. As he descends into madness over the years, he becomes increasingly aware that his survival was no accident and that his destiny - and the fate of the human race - are part of a profound, cosmological plan.