Synopsis by Hal Erickson

Elizabeth Taylor played her first grown-up romantic lead in the Anglo-American melodrama Conspirator. Taylor portrays Melinda Greyton, the new bride of highly respected Major Michael Curraugh (Robert Taylor). It comes as quite a jolt when Melinda learns that her husband is actually a spy for the communists (ironically, Robert Taylor had been one of the friendliest of friendly witnesses during the HUAC hearings.) Much of the film takes place in a picturesque Welsh village, an unusual setting for a tense espionage yarn. Reversing the usual MGM "tailor the story to the stars" formula, the storyline in Conspirator is sometimes more compelling than its leading players. Still, Liz Taylor acquitted herself nicely, proving that she'd have little difficulty tackling meaty dramatic roles in future films.

http://www.allmovie.com/movie/conspirator-v10838