The protagonist is eighteen-year-old Princess Ivy, daughter of King Dor and Queen Irene, older sister to Prince Dolph. Due to her ancestor Bink's deal in the second Xanth novel, The Source of Magic, Ivy has a magician-caliber magical talent of being able to selectively enhance the world around her to match her expectations. The story begins when Ivy decides to use the Heaven Cent, located by Dolph in the previous book Heaven Cent, to find the Good Magician Humfrey, who had been missing since Vale of the Vole.