Alix is worried sick about finding a date for the prom. But soon she is caught up in something that makes finding a date for prom pale in comparison: a thousand-year rivalry between a werewolf and a vampire. For the past millennium, Rancour has dedicated himself to ridding the world of vampires, while Shay has kept busy thwarting Rancour's efforts. Despite fighting for years, these combatants are on the verge of becoming comrades — both have an enemy stalking them, and he's doing so backwards through time.