- Directors: Henry Hathaway
- Producers: Charles Brackett
- Writers: Charles Brackett, Richard L Breen, Walter Reisch
- Genres: Drama, Film-Noir, Thriller
- Actors: Marilyn Monroe, Joseph Cotten, Jean Peters, Max Showalter
On a delayed honeymoon (they have, in fact, been married three years), Ray and Polly Cutler (Max Showalter and Jean Peters) arrive at their Niagara Falls cottage for some romance and relaxation. However, when they arrive they find out that their reserved cabin is occupied by another couple, George and Rose Loomis (Joseph Cotten and Marilyn Monroe). They politely offer to take another cabin, but the two couples become unavoidably tangled as time goes on.
The Cutlers quickly catch on to the Loomises’ bizarre relationship. Rose is much younger than George, who appears to have problems with depression, paranoia and anger management. It is even implied that he may have just been released from a mental hospital. Things become further complicated when Polly happens upon Rose kissing a young man named Patrick (Richard Allan). Both Cutlers also witness George’s rage firsthand the following evening after he cuts his hand while breaking a record and then trashes his hotel room.
It turns out that George has correctly assumed that Rose is cheating on him. Even worse is that she is planning his death with the assistance of Patrick, hoping to frame it as an accident. When the murder is completed, Patrick will put in a request at the nearby bell tower. Rose’s and Patrick’s “song” will play and Rose will know George has been killed. When she does hear these bells after her husband’s planned disappearance, she assumes the murder has taken place.
Polly is rescued by helicopter, and is reunited with her husband. They thank the police and leave the scene, arms around one another.