When Caleb Wardell, the infamous 'Chicago Sniper' escapes from death row two weeks before his execution, the FBI calls on the services of Carter Blake, a man with certain specialised talents, whose skills lie in finding those who don't want to be found. A man to who Wardell is no stranger. Along with Elaine Banner, an ambitious special agent juggling her career with life as a single mother, Blake must track Wardell down as he cuts a swathe across America, apparently killing at random.