From the moment sixteen-year-old Madison Grant is abducted, an unthinkable terrorist plot is set in motion–pitting Special Agent Kelly Jones against her most powerful adversary yet.

The kidnapper's ransom demands aren’t monetary…they come at a cost that no American can afford to pay. As Kelly’s fiancé, Jake Riley, races to find Madison, Kelly is assigned to another disturbing case: the murder and dismemberment of a senator.

At first the two cases don’t appear to be related. But as Kelly navigates her way through the darkest communities of America–from skinheads to biker gangs to border militias–she discovers a horrible truth. A shadowy figure who calls himself The Gatekeeper is uniting hate groups, opening the door to the worst homegrown attack in American history.