From the same cultural and time as Abe Lincoln (Charles Edward Bull), Davy Brandon (George O’Brien) grows up to be an American surveyor and explorer, building the American nation. Davy loses his father in a Cheyenne attack, leaving Davy bitter to Indians. When Lincoln authorizes a railroad between the two American coasts in 1862, Davy is ready to work for Thomas Marsh (Will Walling) whose daughter Miriam (Madge Bellamy) he loves. She is engaged to engineer Peter Jesson (Cyril Chadwick). Their ordeal at building a continental railway is under constant attack. Chinese, Irish, and Italian immigrants, are killed by hostile native tribes along the way. Davy also meets Buffalo Bill Cody (George Waggner) and Bauman (Fred Kohler), a land owner wants the train to go through his land, but Davy recalls his father’s theory about a shortcut in order to drive that Golden Spike into the last railroad tie sooner when the West and East meet in Utah.