The hills of San Camillo are burning. Mercury Hale is preparing for his impending wedding, but those plans are interrupted by the assault astral fiend that's literally on fire. When he tracks it down, he runs headfirst into an unexpected ally.

Bowen Cord and Niall Phelan are hunting an arachnafury warped by dark magic that has terrorized a distant archipelago. Cornering their prey leads them through a strange gateway that lands them in another world—one with which Bowen feels he's strangely familiar.

Forces collide in a frantic race to corner and slay the monstrous new threat, before it burns everything down.