Forced to leave his own planet because of a civil war, Prince Anton flees into the unknown universe with only his all-knowing, automatonic horse, Thurgose, for company. En route to Earth, the closest inhabited planet, Anton quickly finds enemies are chasing him and he must veer to another planet where heralded fighters face off against weeds and poaching creates serious dangers. His spaceship damaged, he and Thurgose return to an Earth where every thought is captured by computers, as ambitious residents battle for the chance to get pills that will make them immortal. Trapped inside a military complex, Anton must find a way to escape, get back his ship, and somehow evade his enemies in the heavens above and on Earth. To do that, he has only a woman who has deserted her post to help him and an energy-deprived Thurgose.