Rachel thought she was facing the battle of her life when her son was diagnosed with leukemia. Then the Ancient Gods rose and brought the apocalypse with them. Some people accept their new deities, others wage war for the future of humanity.

Desperate to protect Adam from enemies both mythical and biological, they flee the city hoping to find shelter in the mountains. Instead, they discover mutations, grotesque plants and animals warped by the changing world. When Adam's cancer cells begin to mutate as well, the Rachel is forced to choose between his life and their freedom.