"High above the planet Harmony, the Oversoul watches. Its task, programmed so many millennia ago, is to guard the human settlement on this planet, to protect this fragile remnant of Earth from all threats. To protect them, most of all, from themselves. The Oversoul has done its job well. There is no war on Harmony. There are no weapons of mass destruction. There is no technology that could lead to weapons of war. By control of the data banks, and...

The planet Harmony is governed by a computer whose job is to ensure humans are kept at a low technological level so they don't repeat the mess they caused on Earth. But the computer is breaking down and asks the humans to repair it. For one lot of humans this is an opportunity for freedom.

The conclusion to a religious saga about humans who return to Earth after an absence of 40 million years. They are all dead except for Shedemi who is orbiting the earth in a spaceship with Oversoul, the computer on board, seeking the Keeper of Earth, the supreme being.