Alfred Hitchcock directs this suspense thriller set in London's theatreland. On the run from the police, Jonathan Cooper (Richard Todd) takes refuge in the home of his former girlfriend, RADA student Eve Gill (Jane Wyman). Although Cooper has been spotted fleeing the scene of a murder, he insists that he is innocent. Eve believes his story, but knows that the police won't, so she decides to play detective herself. Marlene Dietrich co-stars as Charlotte Innwood, a seductive star of the stage whom Eve eventually pinpoints as the real murderer.