Before the story starts, Margot Mary Wendice has a brief affair with mystery writer Mark Halliday while her tennis player husband, Tony, is away. A love letter was stolen, and she is being blackmailed. Mark comes to visit the couple, and Tony sets a diabolic plan in motion.
This movie was based on a play and filmed in 3D, a method prominently used in the 50s. The remastered and released in 3D version (2012) can be requested through SWAN.
For other Alfred Hitchcock films, see The Genius of Alfred Hitchcock: His Movies & TV Shows.