Assigned to examine a portentous tape sneaked out of Moscow by a mole, CIA Kremlinologist Charlie Stone finds himself in an espionage investigation of staggering complexity. As he hops among three continents, often the target of both the KGB and the CIA, Stone succeeds in vindicating his father, branded a traitor by McCarthy, while nosing out a plot by the head of the KGB to stage a violent coup during a Moscow summit that will end glasnost and set the world on its ear.