The world is ending. Somewhere between the Crusades and the Enlightenment, the 1500s was a strange time for Europe. The Black Plague, the Spanish Inquisition, the Medici family with too much power across Italy and - once they got one of their own as pope - across the globe. This was made all the more strange by the end of magic across the planet. Pope Leo X was a cruel man, by all historical records. What those records don’t show was the private school he ran for the magically gifted. After manipulating one such student into destroying anything with Aztec writing on it, Leo embarks on a terrifying new spell - one that would bring about the final Crusade, and the end of the world as we know it. What he doesn’t account for is one of his students - Katherine - to escape his school and run to her monster-hunting sister for help stopping him. This is the story of two sisters, forgotten by history, and how they changed the world.