Romance of the Rockies (1937)

Circuit-riding Doctor Tom Foster (Tom Keene) is roaming the country with Mike, an excitable little Italian who practices dentistry, and Jimmy Allen, a young boy whose missing father the trio is trying to locate. Arriving in the town of Elkhorn, Tom, by accident, gets involved in a plot to derive the ranchers of water, and discovers that the lake that is the source of the valley's water is controlled by the villainous Stote (Frankyn Farnum), although it was formerly the property of Jimmie's father. Although a secret he will not betray, he solves the mystery of the missing man, and settles the water problem, aided by Betty Ross (Beryl Wallace), the banker's daughter.