The world, according to Grace, is under an ancient curse. There once was a princess named Obsidiana, who was trapped in time by the greedy king of Pangea. To protect Obsidiana from dark and gloomy days, the king put her in a crystal casket made of spider silk woven so tightly that time itself could not penetrate. The king's greed for power doomed his kingdom and the trapped princess. Sigrun sees eerie parallels between the tale of Obsidiana and the present-day crisis, and realizes it is up to her and her friends to break the ancient curse and fix the world.
