The film follows Fan who was born on April Fool and caught into a circulatory day full of bad experiences. However, A mysterious man appears and helps him find out a way.

The cast is introduced to the settings and suspects of a murder case for the new episode. The cast then chooses their role in the episode, as a particular suspect or the detective.

Go Fighting! is classified as a game-variety-reality show, and the MCs and guests complete missions at a landmark to win the objective. Usually each episode will also have an over-arching theme or story. Each episode varies in the challenges and the instructions given to the MCs, and rules are not strictly enforced, resulting in a largely unscripted show.