Islamic and Christian fundamentalists unleash a well-coordinated series of attacks all across the American heartland. Stolen radioactive material, a high-level spy, a mysterious break into top-secret data-encryption technology, twisting plots and spiraling conspiracies are all linked with fast-paced, cinematic crosscutting. In this thriller, FBI agent Jeremy Waller returns, as does tough-as-nails Elizabeth Beechum, now vice president, and the enigmatic billionaire Jordan Mitchell.