Christopher Carson, or as he was familiarly called, Kit Carson, was a man whose real worth was understood only by those with whom he was associated or who closely studied his character. He was more than hunter, trapper, guide, Indian agent and Colonel in the United States Army....His lot was cast on the extreme western frontier, where, when but a youth, he earned the respect of the tough and frequently lawless men with whom he came in contact. Integrity, bravery, loyalty to friends, marvelous quickness...

Ethan Hopkins and Mickey McSquizzle-a "Yankee" and an "Irishman"-encounter a colossal, steam-powered man in the American prairies. This steam-man was constructed by Johnny Brainerd, a teenaged boy, who uses the steam-man to carry him in a carriage on various adventures.

Our young hero and his companion plan to make their fortunes in the California gold rush. Having made their way to Missouri, they join a wagon train headed for the famed Oregon Trail, but being carefree and adventuresome young men, they are not happy relaxing by the fireside of an evening. Encounters with animals, raging rivers and "Injuns" keep them interested in their voyage, but what will the Pacific Coast hold for them?