The only member of the original mission to the planet Rakhat to return to Earth, Father Emilio Sandoz has barely begun to recover from his ordeal when the Society of Jesus calls upon him for help in preparing for another mission to Alpha Centauri. Despite his objections and fear, he cannot escape his past or the future.

Old friends, new discoveries and difficult questions await Emilio as he struggles for inner peace and understanding in a moral universe whose boundaries now extend beyond the solar system and whose future lies with children born in a faraway place.