Heck of a thriller, though the narrative is difficult to piece together at times. Stanwyck gets to run through a gamut of hysterical emotions as the intended victim. Her Leona is not particularly likable as the rich man's daughter who gets her way by bullying people around her. So there's some rough justice in her predicament—alone, disabled and dependent on the phone while a killer seemingly stalks her. Even the independent working-man, a studly Henry (Lancaster), is bullied into taking up with her. Of course, it doesn't hurt that she's got scads of money to assist her schemes. Incidentally, catch how Henry's several capitulations to others (Leona, Morano) are marked by allowing them to light his cigarette. Nice touch.
The idea of only gradually revealing why Leona is being set up for murder is a good one. It adds to the suspense—not just a 'when' but also a 'why'. The trouble is the disclosure is only revealed in pieces over the phone using flashbacks, and these are hard to piece together over a stretch of time. But enough comes through that we get the idea. There's some great noir photography from Sol Polito that really adds to the tense atmosphere. Anyhow, it's a great premise that also played well over the radio that I recall as a kid. It's also a subtle irony that one could end up being so alone in the middle of a great city. Poor Leona, maybe if she had been a little nicer and less bossy over the phone, she might have made the human connection she needed.