Nanotechnology saturates the world. It makes possible glittering orbital cities. But strict laws regulate its use, and death follows for those caught in violation. The threat of death means little though, to a man already condemned to die. Nikko - post human, genetically engineered to survive in space, and desperate to escape his fate - steals a forbidden nanomachine. But the theft goes awry and the nanomachine escapes into the wild - igniting a desperate race to contain it before the definition of "human" changes for all time.