Tom Kelly, a small-town baseball pitcher, is sent to a minor-league team in Florida, and fails to make the team. He starts dabbling in real estate, in the midst of the Florida land boom (in which a lot of the land sold was under water), makes a fortune and buys into the team that cut him from its roster.

Alaskan railroad magnate Curtis Gordon hires engineer Dan Appleton to design a railroad route up the Salmon River to the rich gold country. Gordon turns down the engineer's proposed route in favor of his own, and Appleton quits. Murray O'Neil, a rival builder, hires him and falls in love with his sister Eliza, while Appleton courts Natalie, Gordon's stepdaughter. Following Appleton's plan, O'Neil lays the trail with a bridge crossing the river in face of Gordon's opposition.

Crook Dave Darcy gets reformed by working in a steel mill owned by someone who witnessed his crime.