Peace,like our High Middle Ages, it is closely linked to the Abyss - measuring where there are the usual laws of nature. Anyone who owns a door to the Abyss and can enter into a contract with the "chain" - there the occupant - gets tremendous power. Such people constitute an aristocratic elite, but do not reveal the source of strength and power.All contracts with Abyss controls the mysterious organization "Pandora" will bypass it a great risk body and soul. For example, you can fall into the abyss for a moment and come out a couple of hundred years... The story begins with the celebration of age Vessalius Oz, son of the Duke and heir to one of the four Great Houses.Oz - man intelligent and determined, used to hide the true nature behind a mask spoiled landlord. And at night, when the young lord turns 15 years old, he was arrested and without trial or explanation thrown into the Abyss, simply "because of who you are." Only miscalculated agents Pandora - the guy get out, oh, yes... got more than one.It does not matter that it has been ten years in the real world - our hero a lot of questions, and he had nowhere to hurry. After all, anime is based on "Alice in Wonderland", where only the White Rabbit hurried - and Oz got a Black!