Set in the American West, particularly in the vast landscapes of the ranches and ranges, "Frances of the Ranges" likely follows the adventures of the titular character, Frances, a young woman living in this rugged frontier environment. The story may revolve around Frances's encounters with the challenges and opportunities presented by life on the ranch, as well as her relationships with the people around her.The subplot involving the "Old Ranchman's Treasure" suggests a mystery or quest element to the story. Frances may become involved in a search for hidden treasure, facing obstacles and dangers along the way. This theme was common in adventure fiction of the time, appealing to readers' sense of adventure and exploration.