In a world overrun by monstrous creatures known as Aragami, humanity teeters on the brink of extinction. The remnants of civilization survive in fortified cities, protected by specialized warriors called God Eaters. These fighters wield weapons known as God Arcs, which are made from Oracle Cells—the same material that composes the Aragami. The story centers on Lenka Utsugi, a new recruit to the Fenrir Far East Branch, an organization dedicated to combating the Aragami threat. Lenka joins the elite First Unit, led by the experienced and stoic Soma Schicksal, alongside other skilled God Eaters such as Alisa Ilinichina Amiella, a determined but emotionally scarred fighter, and Kota Fujiki, Lenka’s childhood friend.

As Lenka trains and adapts to his role, the series explores the dynamics within the First Unit, particularly the tension between Soma and Alisa, who harbors a deep-seated grudge against him. The narrative delves into the psychological toll of fighting Aragami, as well as the moral ambiguities of using God Arcs, which require bonding with living Oracle Cells. The story escalates when a new, more dangerous type of Aragami, the Dyaus Pita, emerges, posing an unprecedented threat to humanity. This development forces the God Eaters to confront their limitations and the ethical dilemmas of their existence.

The series also examines the broader societal impact of the Aragami crisis, including the desperation of survivors and the political machinations within Fenrir. Lenka’s journey is one of growth and self-discovery, as he grapples with his own motivations and the weight of his responsibilities. The narrative builds toward a climactic confrontation with the Dyaus Pita, testing the resolve and unity of the First Unit. Through its exploration of survival, sacrifice, and the human condition, the series presents a compelling portrayal of a world on the edge of collapse.