The distant future. Humanity has reached unprecedented heights of development: people are now virtually immortal and all-powerful, capable of creating new suns and completely restructuring bodies and minds, spending their lives in leisure and philosophizing, with wars and crimes long forgotten โ a golden age, in a word. Nearly everything is now decided by the intelligent computers of the Sophotects, capable of thinking many times faster than humans. But one day one of the wealthiest men of the Golden Oecumene, Phaethon of the house Rhadamanth, is attacked and discovers that part of his memory has been erased, and that he is not wealthy at all and lives at the expense of his "father" Helion (their familial relationship is rather complex, yet he thinks of Helion as a father). His attempts to recover his lost memory bring Phaethon into conflict with the entire power structure of the Oecumene and lead to his exile, as he strives to give humanity a new impulse of development and take it beyond the Solar System, while those in power wish only to preserve and consolidate the current "happy" state of affairs.