Each must use all his craft to arrive at the truth, but Filitov gets there first -- and that's when all hell breaks loose. Because Filitov, code-named Cardinal, is America's highest agent in the Kremlin, and he is about to be betrayed to the KGB. His rescue could spell the difference between peace and war, and it is up to Jack Ryan to accomplish it -- if he can -- as, in a breathtaking sequence of hunter and hunted, Filitov's life, and Ryan's and that of the world itself literally hang in the balance.