Master Thief Garrett is contacted by the Keeper Artemus, who wants him to steal two valuable artifacts. Meanwhile, Garrett learns that the coming of a Dark Age had been prophesied long ago. Gaining access to the Keeper Prophecies, Garrett learns that an ancient book known as the Compendium of Reproach contains more information about the prophecy. As Garrett is trying to solve the mystery, it becomes more and more clear to him that there is a traitor in the order of the Keepers.