Asian Drama

The movie is set in an aftermath of the sudden dispersal of a legendary town called "Mugen," and recounts the story of the five organizations, who aims to take control in the said area. These five organizations are known as Sanno Association, White Rascals, Rude Boys, Oya High School and Daruma Hooligans.

The five gangs will put their pride on the line as all of them take part in a fierce battle for dominance. However, the plot takes a surprising twist when a mysterious group called "Mighty Warriors" suddenly appears.

A mysterious virus suddenly spreads throughout Japan causing widespread panic. People infected with the virus are called ZQN. The ZQN attack people with superhuman strength and their victims also become ZQN. Hideo Suzuki happens to meet a female high school student, Hiromi Hayakari. They run away from the city together, but Hiromi has been already bitten by a baby ZQN. The baby ZQN that bit her did not have teeth and Hiromi is in half state of 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.