 Tex and Rawhide join a wagon train heading for Oregon. When the guide tries to lead the train astray, Tex exposes his plan and is made the new guide. The guide that quit then gets the Indians to attack the train. The train is saved but it appears Tex led them into trouble and he is dismissed. Tex relizes the guide has a boss that is behind all the trouble and he and Rawhide set out to find him.