Halloween in New Orleans. Rémy Lafitte has paid a charlatan to enact a Voodoo ceremony in the cemetery. The ritual reanimates Niko Valdés, a French Quarter tutor who was damned to Everlost for murdering his sister’s rapist. Mild-mannered stockbroker Heidi Purdue stumbles upon Niko and Rémy in a compromising position. They are interrupted by a demon on horseback who beheads the charlatan before giving the trio a pentalpha puzzle to solve. Curvy Heidi knows that heartthrob Rémy would never fall for her, but she falls for the undead tutor. Rémy, jealous of the other two’s closeness, agrees to an equitable ménage, opening up to a male lover. The centuries-long battle against primordial evil leads them to a temple, where they find Solomon’s ring. They go past the portal of Hellmouth to redeem themselves, but the real puzzle is how to fulfill the prophecy that they are intertwined inexorably—now and forever.