A London psychiatrist (Robert Newton) catches his wife (Sally Gray) in an affair with an American (Phil Brown). Apparently this is not her first affair, and Newton, as the objective and self-controlled psychiatric professional, decides to settle things in a well-thought-out way by first kidnapping and then imprisoning the American in a hidden room not too far removed from the actual residence, with the ultimate goal of killing him without leaving any incriminating traces. The film could have been more dramatic by playing up the relationship between Newton and the beautiful Sally Gray. Gray seems to be telling the viewer that Newton never really loved her, although it also seems as if her youth and passion were too much for his middle-aged character to handle. In any event the plot, which is remarkably well done, inevitably leads to a police or Scotland Yard type investigation and eventual solving of the crime, rather than a dark story.
Review of The Hidden Room
