A young man, Robin, who has traveled the galaxy for thousands of years spent mainly in hibernation, has made his way to The Computer Planet's advanced medical facility which he hopes will be able to cure his mate, a young woman named Veronica, with brain damage. The people of the Computer Planet, who consist solely of the clones of four advanced human individuals none of whom have any sexual capability, are not able to cure Veronica. But their Computer tells them that they should send Robin and Veronica to the Planet of the Puppetmaster where the Puppetmaster and his wife, advanced humans capable of sex but not of reproduction, live. The Puppetmaster creates androids, both for himself or for export, sexual as well as non sexual one. Unknown to Robin, entranced by the Puppetmaster's sexual androids, The Computer Planet people have created a duplicate of Veronica from an egg and when she has grown up send her on a faster ship than Robin's so that she arrives there when he does.