When Fiona Grant sets out from London for a Scottish holiday at her parents' home, she has no inkling that her well-ordered life is about to dissolve into chaos and terror. But the mysterious quickly becomes commonplace: Blocking the highway home is a car with a dead driver at the wheel, and a strange figure systematically searching both the car and the body. He is Max Wyndham, an attractive naval officer assigned to plug leaks of important military secrets to enemy agents at a military installation near Fiona's home. With growing apprehension, she learns from Max that the townspeople living near the installation—even her parents—are suspected of involvement with foreign agents.
In a tale studded with the unexpected, Fiona is drawn into a world of spies and counter-spies—where nothing is at it seems. Filled with action, surprises and a heart-stopping climax, Mask of Treason confirms Anne Stevenson's place as a master of the suspense genre.