In 1903, Doctor Huntington Bailey meets a friendly older lady during a train trip. She tells him that she is going to visit her brother Nick and his lovely young wife Allida. Once in New York, Bailey hears that his train companion suddenly died. Shortly afterward, he meets the strange couple and gets suspicious of Nick's treatment of his wife.
| Directing | Jacques Tourneur | Director |
| Writing | Warren Duff | Screenplay |
| Writing | Margaret Carpenter | Novel |
| Production | Robert Fellows | Executive Producer |
| Camera | Tony Gaudio | Director of Photography |
| Crew | Vernon L. Walker | Special Effects |
| Art | Albert S. D'Agostino | Art Direction |
| Art | Jack Okey | Art Direction |
| Art | Darrell Silvera | Set Decoration |
| Art | Claude E. Carpenter | Set Decoration |
| Sound | John E. Tribby | Sound Recordist |
| Editing | Ralph Dawson | Editor |
| Sound | Roy Webb | Original Music Composer |
| Sound | C. Bakaleinikoff | Music Director |
| Costume & Make-Up | Leah Rhodes | Costume Design |
| Costume & Make-Up | Edward Stevenson | Costume Design |
| Directing | Dewey Starkey | Assistant Director |
| Sound | James G. Stewart | Sound Re-Recording Mixer |
| Production | Warren Duff | Producer |
