Dr. Hairo Kisaragi is the best general surgeon in the business, devoted to helping others no matter who they are. A prodigy in examining, dissecting, and repairing the human anatomy, there is no medical expert in Japan that could possibly live up to his name. But when it comes to the undead, just how much will his skill and philosophy carry him forward? When his heart of gold is replaced by a heart of death in a medical disaster, he is thrust into the world of the paranormal, forced to carry the burden of a new past, present, and future on his shoulders.