Dedicated secret agent Davina Graham has risen to become the first woman chief of the British Intelligence Service. Now a new, more ruthless phase of the Cold War eappears to be opening with the assassination of the U.S. Secretary of Defense in Venice. But both the Russians and the Western allies are baffled by what happens next. The tension mounts as Davina races to find out who's responsible, while she's torn between the demands of her job and those of her private life.