Kat McCane is a normal 17 year old pianist, an orphan that doesn't really care about the past. But is more focused about the now and what the future will bring. But when Kat purchases a journal and meets the Shadouchirashi Crimson, her normal life is flipped upside down and into the Under Realm. She must learn how to control her untapped power and learn the secrets that a new world will hold, but those secrets will help her unlock her own secrets that were buried in time so long ago.