A dark, forgotten demon is freed to stride the city streets once more, taking lives as it burns through one body after another. Josephine Chattoway, recently sold into marriage by an absent father, is escorted by her bohemian Aunt Sylvia to meet her erstwhile suitor. Along the way, she discovers the visions which have made her doubt her sanity for so long are real. They are also the key to unlocking powerful ancient protectors which will stand between a demon and countless innocent victims.

With a plucky batch of gargoyles and a not-quite mad scientist, Josephine and Sylvia must fight for a city that doesn't even realize its plight, knowing that if the demon finds Josephine, hell will reign on earth.