This film is a sequel to the 1931 version of "Riders of the Purple Sage" and is a pretty good Western movie.
John Shefford comes to Arizona in 1885 looking for Fay Larkin, a girl who he has only heard of. He knows the story of the gunman Lassiter and Jane Withersteen living in a hidden valley in the mountains, as told in "Riders".
John takes a pack train to an outlaw encampment, there he rescues an Indian girl from an attempted rape by a white outlaw and is befriended by the chief Lone Eagle. He meets a young girl named "Sago Lily" who is living with the outlaw leader and his wife.
What follows are gunfights, romance, and more Zane Grey action, along with a comical stuttering cowboy who plays the harmonica.