Satake Hirofumi is a death row inmate convicted of murdering his fiancée. He is also an "Undeadman" who has survived numerous desperate situations. Consequently, he has attracted the attention of a research institution known as "Human Crazy University," which investigates real-life miraculous phenomena and the individuals entangled in them. Now under their study, Satake shares his memories of an immortal yet unhappy life with them. Why did he kill his fiancée? Before long, the truth reveals a much larger conspiracy...