SOME DEMONS LIE WITHINWhen the San Andreas fault fractures, unholy lava creatures spill forth with only one mission: to feed. Earning the name "Demons," the beasts put mankind into a state of constant siege. With failing defenses against the Demons, the American government throws its remaining resources into one last weapon, a cybernetic superhuman soldier.Arthur Morris has been dead for twenty years, but he is the perfect candidate for the program. Now, his cryo-preserved body and mind is revived with cybernetic implants, enhanced reflexes, immense strength, and inborn weapons and combat knowledge.Joining him are the other members of Xtremis, technologically augmented individuals from around the world gather together in one last ditch effort to find a way to defeat the Demonic threat. As Arthur adjusts to his new world, and body, he and the other personalities he clashes with on the Xtremis team are thrust into the breach in a battle for their lives-and the survival of the planet.