Duncan McIvor saves Duke and Bill from an attack by hostile Indians, and he is welcomed onto the wagon train. However, McIvor does not tell them at first that he is an Army lieutenant transferring to Fort Chacon which is a disciplinary post. Several people riding with the train purchase items previously stolen from the Army from two men who go by the names Garrett and Whitey. Duke learns about it after all the goods have been sold so he runs the men off. Upon hearing about it McIvor suggests Duke should have arrested the men and confiscated the goods. After Charlie and Barnaby find two soldiers staked out Indian style McIvor reveals his identity and confiscates the items, much to Bill's displeasure as the people are not compensated. However, when McIvor informs the Colonel in charge at nearby Fort Chacon of this, he is ordered to stop his investigation and soon finds himself court-martialed when his West Point roommate betrays him.
—rbecker28