High school student Kei Nagai is struck dead in a grisly traffic accident but immediately revives to learn that he may not be like every other human. Instead, he may be a mysterious, almost-immortal being, granted not only the power of rejuvenation but also the ability to see supernatural beings. Scared, he runs away and is aided by a friend in his escape from society. Unfortunately for Kei, a manhunt is on, and he will soon be caught in a conflict between mankind and others like him as they prepare to fight a new war based on terror.