Shocked by the murder of a friend, FBI Special Agent Kit McGovern vows to bring the killer to justice. Then the shooter kills again, and again ... and again. Saddled with an unpredictable partner, forced to put her personal life on hold, Kit doggedly pursues the sniper. Quantico sends a geographic profiler to help identify him, but the killing of a young woman outside the probability zone casts doubt on that technique. As panic grips the Hampton Roads area, pressure mounts, and Kit soon finds herself in the crosshairs of failure-and death.