In the Land of Magic, children never grow old. Gifted with marvellous powers, they spend their days being taught by the magical books of Library Island. But for one child, this life is not enough, and the call of the Island of Darkness is too strong to ignore. When Grace wakes up in Wasteland, the colourless city where grown-ups live, she no longer remembers the Land of Magic. She doesn't even remember her own name. Alone and afraid, Grace discovers that Wasteland is no place for a child. A terrifying figure called the Catcher is looking for her, and the only clue to Grace's past is guarded by a group of mysteriously invisible children, who have branded her a traitor. Can Grace uncover the secret of the invisible children, and find her way back to the Land of Magic, or will she be trapped in Wasteland for good?