Only an empire, a single planetary government, will save humanity from endless strife in the era of high technology leading to the death of civilization. Cain knows this - a strange creature in the guise of a robot who revived the last, miraculously preserved inhabitant of the Earth. Cain has seen many worlds where the inhabitants missed the opportunity to create a planetary empire before entering the technological era - and therefore died in the fires of thermonuclear wars. Cain knows how to open doors to the past. And with his help, the last earthling Niki gets a second chance for his planet. He will be able to try once again to do what his ancestors could not - to unite the planet and preserve civilization. With the powerful hand of the emperor... All Earth.