One of the tales from Anne McCaffrey's Crystal Singer series.
She was one of the Crystal Singers, the elite, mysterious ones, who cut the crystals from the planet Ballybran - precious glittering crystals without which the universe could not function.
Sent to the planet of Optheria to repair the famous crystal organ, she was - at first - accorded all the honour and pomp due to her rank. Then her life became threatened and she found herself isolated at the very heart of the planet, knowing that she alone had the power to confront and destroy the evil that had permeated the world of Optheria.
