An enterprising Yankee, after being struck on the head during a scuffle, is transported from late 19th-century Connecticut to the time of King Arthur. Thanks to the American's boundless energy and ingenuity, knights and nobles, wizards and monks, fair maidens, and ordinary people are introduced to the benefits of civilization. To their amazement, they discover soap, gunpowder, electricity, newspapers, the telegraph, and many other innovations.