Shod with Fire (1920)

Ann Lytton arrives in a small Arizona town just as ranchman Bruce Baynard brings a man into the hotel who is unconscious from drink. The man proves to be Ann's husband Ned, whom Bruce takes to his ranch in order to reform. When Ann comes to visit, Ned accuses her of having an affair with Bruce and, to punish her, he forces her to go to the mine which he has swindled from Benny Lynch's father. Fearing Lynch's vengeance, Bruce has warned Ann not to allow Ned near the mine, and so Ann sends Bruce an "SOS" via his horse Abe. Bruce manages to save Ned, but Lynch finally exacts his revenge by killing him, thus freeing Ann to marry Bruce.