, though credited as Casey Adams) and Polly Cutler (portrayed by Peters) Ray and Polly Cutler, a couple on a delayed
honeymoon, arrive at
Niagara Falls. Ray goes to call his boss, Mr. Kettering, whom he expected to find waiting for him. However, it appears that Mr. Kettering and his wife have not arrived yet. Meanwhile, Polly finds their reserved cabin occupied by another couple, George and Rose Loomis. When Mr. Qua, the cabin owner, asks Rose to check out, Rose tells them that George is asleep and had been recently
discharged from an
Army mental hospital after his service in the
Korean War and that she doesn't want to wake him, as he is not quite himself. The Cutlers politely accept another cabin without a view of the Falls, and the two couples become acquainted. George and Rose have a troubled and volatile marriage. She is younger and seductively attractive. He is jealous, depressed and irritable. While touring the Falls the following day, Polly sees Rose passionately kissing another man, her lover Ted Patrick. That evening, Rose joins an impromptu outdoor party and requests that a
record of her favorite song, "Kiss", be played. George storms out of their cabin and breaks the record, suspecting the song has a secret meaning for Rose. Seeing that George has cut his hand with the record, Polly visits his room to apply
mercurochrome and bandages. George confides that he was a
sheep rancher whose luck turned for the worse after he married Rose, whom he met when she was a
barmaid. ) The next day, Rose lures George into following her to the dark
tourist tunnel underneath the Falls, where Ted is waiting to kill him. To let Rose know that George is dead, Ted will request the
Rainbow Tower Carillon play "Kiss". When she hears the song being played on the carillon bells, Rose assumes that George is dead. However, it is George who has killed Ted, thrown his body into the Falls, and collected Ted's shoes at the exit instead of his own. This leads the police to believe that George is the victim. The body is retrieved and the police bring Rose to identify George's body. When the cover is lifted from the face and she recognizes the dead man, she passes out before saying anything and is admitted to the hospital. Mr. Qua moves the Cutlers' belongings to the Loomises' cabin. George comes to the cabin seeking revenge on Rose but finds Polly sleeping there instead. She wakes and sees him before he runs away. She tells the police, who launch a
dragnet. During the Cutlers' second visit to the Falls, George finds Polly alone for a moment. Trying to escape, she slips, but he saves her from falling over the edge into the waterfall torrent. He explains to her that he killed Ted in self-defense and begs her to "let me stay dead". Polly leaves without answering. Later that day, she tells the police detective that she believes George is alive. George has the carillon play "Kiss" again to panic Rose, who flees the hospital, intending to cross the
border back to the United States. Finding George waiting at the border for her, she flees and tries to hide in the carillon bell tower. In a fit of anger, George catches her and strangles her beneath the silent bells. He tries to flee but realizes that he is locked in the building. Realizing what he has done, he sits down next to Rose's body and remorsefully tells her that he loved her. After a trash man unlocks the door, George flees the tower and heads for the Falls. ) The Cutlers go fishing with the Ketterings in a launch on a section of the
Niagara River above the Falls. When the speedboat moors in
Chippawa for gasoline and other supplies, George steals it to try and cross the Canada–United States border, but Polly returns to the boat before he can depart. Seeing George's hat on the table, Polly realizes he is on board. She tries to stop him from leaving, but he shoves her away, and she falls to the ground. Before George can remove Polly from the boat, the boatman sees him on board, so George has no choice but to depart with Polly on board. Polly tells him to give himself up to the police as he killed Ted in self-defense, but he tells her he cannot because he has killed Rose. Polly is horrified. After the boatman reports the stolen boat, the police set out in pursuit. However, the boat runs out of gas and drifts towards the Falls. The police are unable to help as the boat is too close to the edge. As they near the edge, George scuttles the boat to try and ground it, to no avail. However, this slows it down enough for him to get Polly onto a large rock before he goes over the Falls to his death. A devastated Polly is rescued from the rock by a
U.S. Coast Guard helicopter. She and Ray are reunited and leave the Falls together. ==Cast==