A mysterious virus strikes suddenly, causing panic in Japan among the locals. People infected with this virus carries the name ZQN. ZQN attacking people, have a human and their victims supra turns themselves in ZQN. Hideo Suzuki accidentally encounters a high school student named Hiromi Hayakari. Decide to run away together out of town but Hiromi muăcată was already a toddler ZQN. The baby has bitten-ZQN which does not have teeth and Hiromi is half-man, half-ZQN. The two meet on a school from a shelter Yabu. Yabu hopes to find a cure to heal Hiromi.