"God Eater Prologue" is a short anime series that serves as an introduction to the larger "God Eater" universe, based on the action role-playing game of the same name. The story is set in a post-apocalyptic world where humanity is on the brink of extinction due to the emergence of monstrous creatures known as Aragami. These creatures are nearly invulnerable to conventional weapons, leading to the development of specialized weapons called God Arcs, which are created using Oracle Cells—the same material that forms the Aragami. Only a select group of individuals, known as God Eaters, can wield these weapons.

The narrative centers on Lenka Utsugi, a newly recruited God Eater who joins the Fenrir Far East Branch, an organization dedicated to combating the Aragami threat. Lenka is driven by a personal vendetta against the Aragami, as they destroyed his home and family. His determination and raw talent catch the attention of his peers, but his inexperience and impulsive nature often put him at odds with the more seasoned members of the team, including Alisa Ilinichina Amiella, a skilled but emotionally distant God Eater with a mysterious past.

The series explores the dynamics within the Fenrir Far East Branch as its members undertake missions to protect the last remnants of humanity. The God Eaters face not only the external threat of the Aragami but also internal conflicts and the psychological toll of their constant battles. Lenka's journey is one of growth and adaptation as he learns to harness the power of his God Arc and work alongside his teammates. The story also hints at deeper mysteries surrounding the origins of the Aragami and the true nature of the Oracle Cells, setting the stage for further exploration in the broader "God Eater" narrative.

The series is characterized by its intense action sequences, emotional stakes, and a focus on the bonds formed between the God Eaters as they fight for survival. It provides a concise yet compelling introduction to the world and themes of the "God Eater" franchise, laying the groundwork for the larger storylines that follow.