Lyonesse: a world formed by magic, where a dark power struggle is underway between an ancient sorceress with her shadow army and the human subjects of Lyonesse's power-mad wizard. The only spark of hope is a prophecy that tells of a Defender who will one day come and set things to right. Young Meb doesn't think she's obligated to be the prophesied Defender of Lyonesse, but she is adept at the universe-folding skill of Planomancy and has been trained by a world-walking trouble shooter of the multiverse, the great Dragon Fionn himself-a dragon who is desperately searching the universes for his lost Meb, whom he's come to love. As the legions of Shadow Hall gather and with the Dragon Fionn fast on the way, magical battle is joined, and the destiny of universes hangs upon the courage in one young woman's heart.