Island One is a celestial utopia, and David Adams is its most perfect creation - a man with a brain as advanced as any computer and a body free of human frailties. But David is a prisoner -- a captive of the colony that created him -- destined to spend the days of his life in an island-sized cylinder that circles a doomed and desperate home planet. Thousands of miles below him, a world trembles; its people cringe in terror and despair in anticipation of an impending apocalypse. And as Earth's boundaries, fate has cast one extraordinary human in the role of savior. For David Adams has a plan -- one that will ultimately ensure the salvation of his species . . . or its annihilation.