Charlie Heller is a cryptographer not a spy, let alone an assassin. But the murder of his fiancée and the failure of the CIA to follow up on the case makes everything different. Heller uses his contacts to get behind the Iron Curtain himself and to pursue the three men who killed her. A richly enjoyable thriller about a man with no spy craft taking on the spy world, it demands how far a dangerous game can be played - if a man only knows the rules. Can this amateur outwit his enemies, both in the Warsaw Pact and in the CIA itself?