40-year-old Arnold Gardner is put in charge of the talk show "The Twenty-fifth Hour" after the death of the former host Duncan Mackay. His role on screen creates immediate interest and the program becomes a great success with TV audiences. This proves to be a period of great satisfaction for Arnold, but his childhood friend, Eddie Greenberg, suddenly comes on the scene. Eddie is ill and frustrated by lack of success, and is so resentful and envious of Arnold's fame that he wants him to make a full public confession of a "sin" he committed in his young days.
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On a train headed for England a group of travelers is delayed by an avalanche. Holed up in a hotel in a fictional European country, young Iris befriends elderly Miss Froy. When the train resumes, Iris suffers a bout of unconsciousness and wakes to find the old woman has disappeared. The other passengers ominously deny Miss Froy ever existed, so Iris begins to investigate with another traveler and, as the pair sleuth, romantic sparks fly.
Robert Tisdall finds on the beach the corpse of a woman he knew. Others wrongly conclude that he is the murderer. Fleeing, he desperately attempts to prove that he is not the killer. A young woman becomes embroiled in the effort.
A crime reporter investigating a murder discovers the case hinges on a mysterious woman he had photographed earlier.
