In late 2009, CIA officers in Afghanistan's Kabul station allowed a Jordanian doctor into their closest confidence. In truth, the doctor was an al-Qaeda double agent - and when he blew himself up, the station's most senior officers died with him. <br><br>Years later, the station still hasn't recovered. Recruiting has dried up and the agency's best Afghani sources are being eliminated. At Langley, the CIA's chiefs begin to suspect the worst: somehow, the Taliban has infiltrated the station. <br><br>When they ask John Wells to investigate, he reluctantly agrees to return to the country where his career began. One thing is certain: Americans are dying, and an American is responsible. Wells is the only one who can unearth the truth - if it doesn't bury him first . . .