Special Agent Cailin McKenna and her National Protection and Investigation Unit partners are drawn into a case that started with a pair of school shootings in Minneapolis. They soon learn that a hate group is recruiting teenagers on school grounds, handing out metal music rife with violent messages, and plotting a terrorist offensive on a major Twin Cities venue. The case gets personal when the stabbing of Cailin's brother is linked. To complicate matters, Cailin's fiery new relationship is threatened by the return of a psycho stalker ex-girlfriend hell-bent on getting Cailin back. Cailin soon finds herself in a fight for her life. And the clock is ticking—can she prevail in time to stop the worst terror attack that Minnesota has ever seen?