"Gatapishi" is a fantasy-adventure anime series set in a world where humans coexist with magical creatures known as Gatapishi, small feline-like beings with the ability to manipulate elemental energies. The narrative centers on Rina, a young girl from a remote village, who discovers she has a unique bond with a rare Gatapishi named Kuro, a shadow-element creature with mysterious origins. When her village is threatened by an ancient force known as the Voidbringer, Rina and Kuro embark on a journey to uncover the truth behind the Voidbringer's resurgence and their own intertwined destinies.

The plot unfolds as Rina and Kuro travel across diverse regions, each governed by a different elemental affinity—fire, water, earth, wind, and shadow. Along the way, they encounter other Gatapishi tamers, individuals who have formed bonds with these creatures and use their powers for various purposes, ranging from protection to exploitation. Key characters include Taro, a skilled fire-element tamer with a tragic past, and Mei, a water-element tamer who initially opposes Rina but later becomes a crucial ally. The group faces numerous challenges, including battles with rogue Gatapishi, political intrigue among tamer guilds, and the growing threat of the Voidbringer, which seeks to consume all elemental energy and plunge the world into chaos.

As the story progresses, Rina learns that Kuro is not an ordinary Gatapishi but a fragment of the Voidbringer itself, created as a failsafe to counteract its destructive power. This revelation forces Rina to confront the moral complexities of her mission, as destroying the Voidbringer could mean sacrificing Kuro. The series explores themes of trust, sacrifice, and the balance between creation and destruction, culminating in a climactic battle where Rina and her allies must unite their strengths to prevent the Voidbringer from achieving its goal. The resolution ties together the narrative threads, offering a satisfying conclusion while leaving room for potential future developments in the world of Gatapishi.