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?

Police Lt. Diamond is told to close his surveillance of suspected mob boss Mr. Brown because it's costing the department too much money with no results. Diamond makes one last attempt to uncover evidence against Brown by going to Brown's girlfriend, Susan Lowell.

An atomic explosion awakens Gammera--a giant, fire-breathing turtle monster--from his millions of years of hibernation. Enraged at being roused from such a sound sleep, he takes it out on Tokyo.

Captain Tom Reynolds and his band of skilled O.S.S. operatives are in WWII Burma to train the Kachin natives in modern warfare. But jungle combat, particularly against a Japanese army as familiar with the terrain as the Kachin, is more grueling than Reynolds had reckoned. Some respite is found in the arms of beautiful Carla, but after Chinese rebels cross the border to loot and murder American soldiers, Reynolds abandons all notions of "military protocol" and seeks requital.

Chicago hotel clerk Frank Harris dreams of life as a cowboy, and he gets his chance when, jilted by the father of the woman he loves...