Transported 1300 years into the past, Connecticut engineer Hank Morgan finds himself in Camelot, the legendary home of King Arthur and his fabled Knights of the Round Table. Becoming a friend and adviser to the king, Hank encounters Merlin, Lancelot, Guinevere, and all the other characters from Arthurian legend. As he attempts to take on the task of analyzing the problems of their time, he tries to share his knowledge from the future in order to modernize, Americanize, and improve the lives of the people he meets.