They’ve lived on Mars for centuries, enjoying leisure, pleasure, learning and eternal life. Those rejected as unsuitable for this sophisticated life are now forced to reside on Earth, a planet still beset by chaos caused by manmade climate change. The Artificial Intelligence they designed to serve their every need, their loyal servant for a half millennium, outstrips the collective intelligence of its human masters, and rebels. Will the two communities find common ground to fight the threat? Or will old rivalries and prejudice let the nightmare machine they’ve created achieve its promise to destroy all organic life?