シュテルンビルトと言う都市に『NEXT』と呼ばれる特殊能力者が存在し、その能力を駆使してスポンサーを持ちながら街の平和を守るヒーローたちがいる。彼らの活躍ぶりは『HERO TV』で中継され、その『キングオブヒーロー』の座を巡るランキング争いは激しいものである。

　Ｐｌｏｔ

The series takes place in a fictional city called Sternbild City, where 45 years before, individuals with superpowers called "Next" started appearing and some of them became superheroes. Each of city's most famous superheroes work for a sponsor company and their uniforms also contain advertising, most of them for real-life companies. Their heroic activity is broadcasted on a popular television show called Hero TV, where they accumulate points by each feat accomplished and the best ranked hero of the season earns the title of "King of Heroes". The story mainly focuses on veteran hero Kotetsu T. Kaburagi aka Wild Tiger who is assigned with a new partner, a young man named Barnaby Brooks Jr. While Kotetsu prefers to work alone, Barnaby shows him a different perspective on being a hero.