Elqui City, a vast city in the suburbs of Japan, once a respectable and admirable community, is now a wasteland overrun by vampires of several different groups and factions, with one group at the center of it all, overseeing all the activities taking place in the region, The Kliver Clan. Sebastian Eteru, a 17-year-old orphan has devoted his life to exacting his revenge upon the vampire who took his parents away from him, spent years practicing the art of vampire hunting and perfecting his skills in the field in order to carry out his goal. However, on one faithful day, while carrying out his life's purpose, he would find himself in a predicament that would alter the direction his life takes, forcing him to become the very thing he sought to destroy.