Fenrir is set in the world of Dovus, a sprawling and mystical realm filled with species seen nowhere else. The power of these fauna and flora brought about generations of research and study in Dovus which finally bore fruit with the first Jomir, a human who could bond with another organism and through time and understanding, learn to use its power as they grow to become one. This knowledge has since been lost for centuries, but the power to bind to another organism remains innate in some bloodlines.

Fenrir follows the path of a seasoned Jomir (commonly referred to as a binder) named Fenrir, and his Ahmir (the binded organism) Rowan. Together, through their deep bond and inescapable past, they find themselves faced with endless trials and unforgettable creatures as they travel through the Averian Jungle.