The novel follows the fantastical journey of a 19th-century American engineer who, after a blow to the head, finds himself transported back in time to the medieval kingdom of King Arthur. Using his modern knowledge and ingenuity, the protagonist attempts to modernize the past society, introducing industrial technology and democratic ideas. His efforts to revolutionize the Arthurian world are met with both humor and a critical examination of the social and political issues of both the past and his contemporary society, ultimately leading to a complex interplay between progress and tradition.

The novel is a poignant exploration of the American experience, focusing on two brothers from a small town who find themselves on divergent paths at the dawn of the 21st century. One brother enlists in the military, driven by a sense of duty and the desire for adventure, and is sent to the Middle East, where he confronts the harsh realities of war. Meanwhile, the other brother remains at home, dealing with his own struggles and the impact of his brother's absence on their family. Their journeys reflect the personal and national conflicts of a country grappling with its identity and the consequences of its actions abroad.