When Artemis commits his entire fortune to a project he believes will save the planet and its inhabitants, both human and fairy, it seems that goodness has taken hold of the world's greatest teenage criminal mastermind. But the truth is much worse: Artemis is suffering from Atlantis Complex, a psychosis common among guilt-ridden fairies and most likely triggered in Artemis by his dabbling with fairy magic. Symptoms include obsessive-compulsive behavior, paranoia, multiple personality disorder and, in extreme cases, embarrassing professions of love to a certain feisty LEPrecon fairy.

Unfortunately, Atlantis Complex has struck at the worst possible time. A deadly foe is intent on destroying the actual city of Atlantis. Can Artemis escape the confines of his mind—and the grips of a giant squid—in time to save the underwater metropolis and its fairy inhabitants?