Apocalypse: Sixteen-year-old Alex Keener must struggle for survival when the deadly xenovirus invades his U.S. government Bunker - a virus resulting from the impact of the meteor, Ragnarok, in 2030.
Origins: Alex and friends must journey over hundreds of miles of post-apocalyptic desert to discover the origins of the deadly xenovirus. But when they reach the Great Blight, they find the virus is far more dangerous than previously thought.
Evolution: As two months pass, the xenovirus only grows in lethality, spawning monsters that humanity simply cannot match. It becomes a race against time before the virus engulfs the planet.