Oz Vessalius is the future Duke family. Before the age of 15 years, the young teenager living a totally banal and pretty easy life. But everything changed the day of his fifteenth birthday ceremony at its maturity. Oz was sent into the Abyss by members of Baskerville also called Shinigami. Once there, he made ​​the acquaintance of the Alicequi help out of this hell without knowing that ten years have passed since his absence.