Twenty-two-year-old Jeannie Reese is a computer wunderkind—and the top architect of next-generation security for the Department of Defense. Her latest brainchild is IRIN, the most powerful surveillance technology ever developed. To date, IRIN has remained ultraclassified and inactive. But on the day a shocking act of terrorism strikes U.S. shores, the presidential order comes to launch Jeannie’s creation against the dark forces behind the attack.