While developing a new system to maintain Morganville's defenses, student Claire Danvers discovers a way to amplify vampire mental powers. Through this, she's able to re-establish the field around this vampire-infested Texas college town that protects it from outsiders. 
But the new upgrades have an unexpected consequence: people inside the town begin to slowly forget who they are-even the vampires. Soon, the town's little memory problem has turned into a full-on epidemic. Now Claire needs to figure out a way to pull the plug on her experiment- before she forgets how to save Morganville...