Anarres, Shevek’s homeland, is a bleak moon settled by an anarchic utopian civilization, where there is no government, and everyone, at least nominally, is a revolutionary. It has long been isolated from other worlds, including its mother planet, Urras—defined by warring nations, great poverty, and immense wealth.

Now Shevek, a brilliant physicist, is determined to unify the two civilizations. In the face of great hostility, outright threats, and the pain of separation from his family, he makes an unprecedented trip to Urras. Greater than any concern for his own wellbeing is the belief that the walls of hatred, distrust, and philosophic division between his planet and the rest of the civilized universe must be torn down.

He will seek answers, question the unquestionable, and explore differences in customs and cultures, determined to tear down the walls of hatred that have kept them apart. To visit Urras—to learn, to teach, to share—will require great sacrifice and risks, which Shevek willingly accepts.

Almost immediately upon his arrival, he finds not the egotistical philistines he expected, but an intelligent, complex people who warmly welcome him. But soon the ambitious scientist and his gift is seen as a threat, and in the profound conflict that ensues, he must reexamine his beliefs even as he ignites the fires of change.