A mysterious virus suddenly spreads throughout Japan causing widespread panic. People infected with the virus are called ZQN. The ZQN attacks people with superhuman strength and their victims will also become ZQNs. Hideo Suzuki happens to meet a female high school student, Hiromi Hayakari. They ran away from the city together, but Hiromi has already been bitten by a baby ZQN. The baby ZQN however did not have any teeth and Hiromi is in half state of being a ZQN. They then meet Nurse Yabu at a shelter. Yabu hopes she can draw an antibody from Hiromi. -Based on the manga series ‘I am a Hero’ by Hanazawa Kengo.