Nägel Länge is a young boy with seemingly nothing special, and one who had come from a family of exiles; his sins were plenty, and his goodwill was near to none, and he was infamouly called as "The Sinner". Only then, when a plague hits his homeland and spreads outside, he is one of the only few surviving because of his genetics. Although he is smart, he views humans as tools to manipulate and control. With this skill, he would stop the plague and redeem his and his family's sins.