FBI profiler Jace Valchek was pulled into this parallel realm to hunt for Aristotle Stoker, a human serial killer who preys on vampires and werewolves. Now she works for the National Security Agency of the Unnatural States of America--and her boss is a vampire. At a bizarre crime scene, Jace finds a bloodsucker murdered by magic, fried to the bone and dressed in the costume of the comic book hero the Flash--a character who isn't supposed to exist...