The world is overrun with monsters called Nemeses-and a young boy infected by one will stop at nothing to defeat them all!

Evil creatures called Nemeses fall from the skies and the only ones who can fight them are Wizards—infected ones who survived a Nemesis's corruption. Seth, one of these survivors, vows not only to fight the Nemeses, but to find their mythical nest, Radiant, and destroy it!

Descending into the chambers under Caislean Merlin, Seth confronts Diabal, a being with startling secrets! Seth's friend Melie, meanwhile, falls into the hands of two members of the dreaded Inquisition. On the larger stage, the Queen of Cyfandir calls forth all of the land's defenses to repel an invasion by forces of great power that seem oddly uninterested in going full-out. Ocoho, a member of the Queen's forces, suspects there's more to this invasion than meets the eye, but convincing her comrades of this proves a tough proposition!