During an anti-terrorism operation in Indonesia, FBI Agent Jeremy Waller witnesses something he struggles to comprehend--three Americans are arrested and summarily executed by the CIA. Back home, revenge comes in the form of a horrific terrorist strike in which bombs detonate in Atlanta, Disneyland, and the Mall of America. Waller fears a new axis of evil is emerging: an alliance between domestic terrorists and Islamic terrorists abroad. Now he must find a way to infiltrate their ranks before another attack rocks the world.