 The Overland Pacific RR is laying track through the Comanche hunting grounds with the Indians constantly attacking the workmen. The company sends ace trouble-shooter Ross Granger (Jock Mahoney as Jack Mahoney), posing as a telegrapher,to the nearby town of Oaktown to investigate. He meets saloon owner Del Stewart (William Bishop), Sheriff Blaney (Chubby Johnson) and Ann Dennison (Peggie Castle), daughter of the railroad construction foreman Dennison (Walter Sande.) Dennison is killed when he refuses a bribe from the leader of the faction that is keeping the Indians stirred up against the railroad so that the line will be changed to run through Oaktown. Mahoney, in his days of doubling for Charles Starret in the Durango Kid series, and Sears, as a director of some of them, had seen and been involved with this plot a couple of times before at Columbia but this one has the added advantage of color, Peggie Castle and Adele Jergens.