The novel is a satirical comedy that looks at 6th-Century England and its medieval culture through the eyes of Hank Morgan, a 19th-century resident of Hartford, Connecticut, who, after a blow to the head, awakens to find himself inexplicably transported back in time to early medieval England at the time of the legendary King Arthur. The fictional Mr. Morgan, who had an image of that time that had been colored over the years by romantic myths, takes on the task of analyzing the problems and sharing his knowledge from 1300 years in the future to modernize, Americanize, and improve the lives of the people.