Charlie Heller is an ace cryptographer for the CIA, a quiet man in a quiet back-office job. When his fiancée, Sarah Diamond, is murdered by terrorists at the American Embassy in West Germany and the Company refuses to pursue her killers, Heller takes matters into his own hands. Tracking down Sarah’s killers behind the Iron Curtain in Czechoslovakia, Heller becomes both the hunter and the hunted—an amateur facing off against the world’s deadliest assassins and spies. But nothing will stop him from getting revenge.