Synopsis by Hans J. Wollstein
Having fallen into one of Dupray's traps, Clark Stuart (Ray Corrigan) finds himself in a deep ravine. Smartly, he manages to alert the Mystery Rider (Julia Thayer) by using smoke signals. Meanwhile, Dupray (LeRoy Mason) assigns an underling, Augie (Augie Gomez), to deliver a fake message to wagon train boss Jamison (Hoot Gibson). The wagon train crew is lured out of the Presidio, which is now mainly defended, Alamo-style, by Jim Bowie (Hal Taliaferro), Davy Crockett (Jack Perrin), and little Kit Carson (Sammy McKim). As Stuart, Jamison, and their men ride to the rescue, a blazing fire in the building traps an unconscious Kit.