The city of Sternbild is home to many people of different races, backgrounds, and those who are called "Next". Next are people who possess special powers. They are the superheroes who protect peace within the city.

The story mainly focuses on veteran hero Kotetsu T. Kaburagi (a.k.a. Wild Tiger), who is assigned a new partner—a young man named Barnaby Brooks Jr. Barnaby and Kotetsu usually have trouble working together as they have conflicting opinions on how a superhero should act.

(Source: MU)