The heirs of the dying owner of a valuable radium mine are being murdered as a mining engineer tries to unccover the killer and clear his cousin's name.
A mining engineer teams up with a crusty deputy sheriff to solve the mystery killings at an old mine where the owner's family waits for him to die, and where a valuable radium strike may have been made.
Randolph Scott at this point in his career when he wasn't doing other films was learning the western genre in a series of films that Paramount's B unit was doing from Zane Grey novels. In this particular one, Rocky Mountain Mystery, Grey tried his hand at a detective story and skilfully combined the genres.
Randy's a mining engineer, but he's turning amateur sleuth to find out what's happened to his brother-in-law, who no one has heard from. Upon arriving at the scene he meets deputy sheriff Chic Sale who's investigating the murder of the owner of a mine. The two of them decide to join forces.
The film is set in the contemporary west, at least the contemporary west of when Zane Grey wrote the story. There's reference to Chic Sale's son killed in the Great War and how Scott reminds him of his late son. When these two arrive at the mine, there's a lot of interesting people living there.
As it turns out there's quite an intricate scheme working there of which the homicide is only one aspect. I wish this film had been given a bigger budget and the A treatment because the film had potential.
Young Ann Sheridan is the female lead, this is probably one of her first films in that regard, she'd be signed by Warner Brothers next year.
However the important reason to see the film is the appearance of one of the great stage stars of the last centuries and notorious personalities. Mrs. Leslie Carter (and that's how she was billed) has the role of family matriarch of the clan at the mine and even in her old age you can tell what a beauty she was back then. Her acting is also decent, no exaggerated stage mannerisms from back in her day when she learned her craft from David Belasco.
Her divorce from her husband was one of the great scandals of the day. Divorce back in her time was scandalous in and of itself. She was left penniless by the divorce, but Belasco seeking to capitalize on her notoriety, took her under his wing and trained her in the thespian arts. People exploiting their celebrity, some things never change. You can see her story in the film, The Lady With Red Hair starring Miriam Hopkins and Claude Rains.
By the way she was billed under her former married name to take advantage of the fact that was how the public knew her and to stick it to her ex.
Even without Mrs. Leslie Carter, Rocky Mountain Mystery is a decent film, I wish had been given better production values by Paramount.