Criminal mastermind Artemis Fowl is back and so is his brilliant and dangerous enemy, Opal Koboi. At the start of the story, Artemis has no memory of the fairy people and has returned to his unlawful ways. In Berlin, he is preparing to steal a famous Impressionist painting from a German bank. He doesn't know that his old rival, Opal, has escaped from prison by cloning herself. She's left her double behind in jail and, now free, is exacting her revenge...