It is the year 2071. Humanity has been driven to the edge of extinction after the appearance of man-eating monsters known as "Aragami," which possess immunity to conventional weapons. They devastated the land, devouring nearly everything in their path and leaving nothing behind. To fight them, an organization called Fenrir was established as a final attempt to save humanity by using "God Eaters"—special humans infused with Oracle cells, enabling them to wield the God Arc, the only known weapon capable of killing an Aragami. One such God Eater is Lenka Utsugi, a New-Type whose God Arc functions as both a blade and a gun. Now, as one of Fenrir's most powerful assets, Lenka must master his God Arc if he is to achieve his goal of eradicating the Aragami once and for all. The monsters continue to be born in large numbers while the remnants of humanity struggle to survive the night. Only God Eaters stand between the Aragami and the complete and total annihilation of the human race.