Oriana is a young woman who can only remember one thing: waking up in a cold, damp and dark room all alone only to discover it is full of a nightmare. Now she is out of the room with no recollection of how she got out, where she was or why she was even there in the first place. Ciel is a demon with many secrets and her only hope. Now that she has exhausted all avenues in the human realm she must turn to another, more sinister locale for the solutions to her problems. She follows a butterfly to him and finds in him the ability to gain the answers she seeks. Besides, he is the only one who will give her a 'fair' contract and might not take her soul. Together they embark on a journey about finding the truth hidden within her very mind. Eventually finding their way back to the strange room and unleashing its secrets once and for all.