In the 1840s, Ramsey MacKay, the driver for the struggling Wells Fargo mail and freight company, will secure an important contract if he delivers fresh oysters to Buffalo from New York City. When he rescues Justine Pryor and her mother, who are stranded in a broken wagon on his route, he doesn't let them slow him down and gives the ladies an exhilirating ride into Buffalo. He arrives in time to obtain the contract and is then sent by company president Henry Wells to St. Louis to establish a branch office.

The struggle of a man to build a steam ship to take him across the Atlantic in spite of all setbacks, and his win against a crack sailing boat in the early 19th century.

King Louis XI masquerades as a commoner in Paris, seeking out the treachery he is sure lurks in his kingdom. At a local tavern, he overhears the brash poet François Villon extolling why he would be a better king. Annoyed yet intrigued, the King bestows on Villon the title of Grand Constable. Soon Villon begins work and falls for a lovely lady-in-waiting, but then must flee execution when the King turns on him.

The Invisible Man's grandson uses his secret formula to spy on Nazi Germany.