In the 13th hierarchical city, Kagutsuchi, the Librarium regulates the amazing power of Armagus, a fusion of magic and technology. Currently they are after a wanted criminal named Ragna The Bloodedge, also known as Death, who wants to destroy the Librarium. Due to Ragna possessing a powerful form of Armagus known as the Azure Grimoire, people far and wide are after not only his bounty, but his grimoire as well. This is where our story begins...