Synopsis by Hans J. Wollstein
Is escaped convict Francisco Cortez (Frank Lanning) guilty of killing Jim Lester's father? Cortez himself demurs and Jim (Tom Tyler) is inclined to believe him in the opening chapter of the Mascot serial Phantom of the West. Making the first of several disappearing acts, Cortez leaves a letter behind naming seven men in Rawdon, Texas, who know the identity of the killer. In Rawdon, the seven men and Cortez' daughter Mona (Dorothy Gulliver) all receive anonymous warnings signed by The Phantom. Jim, on his way into town, is attacked by an outlaw (Joe Bonomo), who, when apprehended, denies that he is The Phantom, a statement that is more or less answered by a mystery bullet. Cortez briefly reappears but manages to escape among a pack of wild horses. Jim and Mona take up the chase but their horse is forced into a deep ravine.