As if being newly cursed and wanted for her blood wasn't bad enough, Satine Tierney now owes a very powerful vampire a favor for her help in saving her life. So when Nyathera summons her to the Halloween grand opening of "Ephemeral", a new vampire hotel and casino in Las Vegas, to be paraded around at an all-important treaty-signing, Satine has no choice but to show up. And that's when things get really bad. Supernatural beings from around the country begin mysteriously disappearing, just as a powerful faction of deadly wizards resurfaces, and, oh yeah--what's up with that bizarre (literally underground) fight club out in the desert?