The world ended in 2070, though they didn't know it then. When an alien spacecraft crash lands on Earth releasing a plague of nightmarish proportions, mankind is forced to abandon their world, not to another, but to the future. Utilizing strange time dilation technology salvaged from the crashed ship, they build several great Arks, factory cities on massive treads build to ferry an army of survivors into a future where the plague has died out, but a mishap with the technology sends them millions of years into the future, and now the residents of Ark Four, Valhalla, must figure out how to survive in a savage world torn straight out of the pages of their darkest fantasies.