One of the last bills signed by President Lincoln authorizes pushing the Union Pacific Railroad across the wilderness to California. But financial opportunist Asa Barrows hopes to profit from obstructing it. Chief troubleshooter Jeff Butler has his hands full fighting Barrows' agent, gambler Sid Campeau; Campeau's partner Dick Allen is Jeff's war buddy and rival suitor for engineer's daughter Molly Monahan. Who will survive the effort to push the railroad through at any cost?

Newspaper man "Scoop" Hanlon is looking for a way out of his assigned women's interest column. The one chance he has is to spend the night in the "blue room" of a haunted mansion where a number of people are gathered for a party. When one of the guests disappears from his room, "Scoop" decides to get to the bottom of things.