This is the book that started it all. Meet Hiro and Ryuzakai. Two different boys from different world--almost literally. They live on opposite ends of the globe. But when they both meet at the world renowned Emerald Academy, the similarities between them are breathtaking. Mysterious are abound in both their past and present lives, and they soon find that their lives are in danger from not only outside forces, but somoene closer to home...someone nobody would ever expect. With their friends by their sides, they each confront the man who twisted and destroyed their lives, and take the first steps in reclaiming their futures.