With Kotetsu back on the First League, the buddy system is now the big new project of HeroTV. Two heroes fighting crime back to back due to the popularity of the famous duo: Wild Tiger and Barnaby Brooks Jr. With new heroes protecting Sternbild City, the ability of both veteran and rookies will be put to the test as they find what it means to rely on others to do to what is best for the city they are trying to protect.

In Stern Bild City, those with special abilities are called NEXT, and can use their powers for good or bad. A unique organized group of NEXT appear regularly on Hero TV, where they chase down evildoers to bring limelight to their sponsors and earn Hero Points in the hopes of becoming the next King of Heroes. Kotetsu T. Kaburagi, known as Wild Tiger, is a veteran hero whose performance has been dwindling as of late, partially due to his inability to cooperate with other heroes. After a disappointing season in which most of the other heroes far outperformed Tiger, he is paired up with a brand new hero who identifies himself by his real name—Barnaby Brooks Jr. Barnaby, nicknamed Bunny by his frivolous new partner, quickly makes it clear that the two could not be more different. Though they mix as well as oil and water, Tiger and Bunny must learn to work together, both for the sake of their careers and to face the looming threats within Stern Bild.

The film will revolve around a mystery that happens on the day of the Justice Day festival that celebrates Sternbild's legendary goddess. (Source: ANN)

The first of two Tiger and Bunny movies, based on the first two episodes of the TV series with additional new scenes.