Fighting to advance the Great Hartford Transcontinental Railroad through Hell Gate Pass, Jeff Ramsey (Dick Foran), assistant to the president of the line, is blocked by King Carter (Harry Woods), the self-styled ruler of the prairie domain beyond the pass. Spurred on by Carter, the local Indians hold up stage coaches, pirate wagon supply trains, drive surveying men to seek shelter and burn down the telegraph station, making it all the tougher to get the train through. (official distributor synopsis)