***SPOILERS*** It's when the straight laced director of the Settlement House Commuinty Center George Blake, Kent Smith, started having a hot and heavy affair with model Fay Roberts,Norma Crane, that her jealous boyfriend Park Av elevator operator Mike Jsenson, Lawrence Tierney, started getting hot under the collar as well as in his pants. In an act of revenge Mike broke into Fay's apartment and strangled her to death. That was just moments after George broke off his affair with her and at the same time ended up , in him being the last person seen with her alive, being the #1 suspect in Fay's murder.
Knowing that Mike was a both jealous and dangerous psycho and capable of murdering Fay if she crossed or walked out on him George gets his .25 revolver and goes to confront Make at his place of work the Manor Building in midtown Manhattan and have by making a citizens arrest bring him to justice. As George was to soon find out Mike if anything wouldn't go along with him, to the police, so easy. Even with a gun pointed in his face.
In a wild fight in the elevator Mike easily disarms George and puts him, by knocking him out, to sleep.Planning to drop the unconscious George down a 15 floor elevator shaft to make it look like he killed himself. Mikes plans goes down the drain together with the perfect crime that he thinks he committed by the police getting the drop on him from George's wife Kale, Jannette Moland, who know he was cheating on her with Mikes former girlfriend the late Fay Roberts! It all downhill for Mike after that with him trying to escape from the police by jumping down the elevator shaft on top of a moving elevator and slipping and falling to his death 15 floors below. As for George him and Kale are now back together with his affair with Fay and confrontation with her crazy ex-boyfriend Mike Jenson now long behind him.