Ten millennia ago, the fairy people were defeated in a great battle with mankind, forcing them to move underground. Only the 8th family of fairies remained undefeated - the demons, who live in Limbo, in suspended time. But suddenly the demons are being sucked back to earth. One demon knows the secrets of the fairy world - if humans discover these secrets, the fairies are in BIG trouble. Only one person can stop potential disaster. Unfortunately, that person is a human. And that human is Artemis Fowl.