At the heart of the saga lies Castor, a skilled and contemplative leader within the Imperial Legion. Known for his tactical brilliance and fierce loyalty to his people, Castor wrestles with the complex realities of power and duty in a world teetering on the edge of upheaval. As the son of the emperor and heir to the throne, his actions often influence the fate of the realm, yet he is driven by an internal struggle to reconcile his role as a warrior with his desire to understand the greater forces at play. Castor's path is one of both physical and spiritual trials, as he navigates the tempestuous tides of Elios's ever-unfolding destiny.

Things become a little more complex after meeting Devorah Nullus, an adventerous scholar, historian and explorer from an amphibious race, the Pengu, who uncovers a secret of Eliosi history. Devorah delves into the machinations of the Trypta, an ultra-advanced ant-like species with dominion over universes, whose experiments on Elios's inhabitants ripple through time and space. Raised in the Sanctum Libra, the vast, ancient library within the Holy City, Seraph Sanctum, her quest for knowledge intertwines with the fates of warriors, sorcerers and shadowy figures like Stubbs the Butcher, a feared, avian interrogator and Nirraj Elac a notorious, tattooed, Pengu pirate captain, amongst a number of other characters.

The series explores cosmic themes and the fragile balance between creation and destruction. From the mysteries within the stormy seas of the Western Stormlands, the colossal skeletons that litter the Salvan Sand Dunes, to the entities that call Myko, a forest of giant mushrooms, home, The Nullus Compendium invites readers into a richly detailed world brimming with intrigue, conflict and the relentless pursuit of truth.