The world of Mira is threatened with Armageddon. All people on the surface of Earth will be destroyed if Opal Kobo—the most dangerous criminal in the world—manages to open the Gate of the goddess Danu. Artemis Fowl realized it almost immediately when the first demand from the terrorists arrived: to release the pixie from prison. To everyone’s horror, everything goes precisely according to Opal’s plan, and Artemis has no way to disrupt it—if only because Kobo calculated every possible move the boy could make and made him part of her monstrous scheme.