Young scout Breck Coleman leads a wagon train along the dangerous trail to Oregon as he tries to get the affection of the beautiful pioneer Ruth Cameron and plans his revenge on the harsh scoundrels who murdered a friend of his in the past.
The first part tells the story of Moses leading the Jews from Egypt to the Promised Land, his receipt of the tablets and the worship of the golden calf. The second part shows the efficacy of the commandments in modern life through a story set in San Francisco. Two brothers, rivals for the love of Mary, also come into conflict when John discovers Dan used shoddy materials to construct a cathedral.
Brandon, a surveyor, dreams of building a railway to the west. He sets off with his son, Davy, to survey a route. They discover a new pass which will shave 200 miles off the expected distance, but they are set upon by a party of Cheyenne. One of them, a white renegade with only two fingers on his right hand, kills Brandon and scalps him. Davy is all alone now.
