A Yankee at the Court of King Arthur recap

Connecticut engineer Hank Morgan is knocked unconscious and wakes in King Arthur's Britain. Using knowledge of an eclipse, explosives, communications, and manufacturing, he defeats Merlin's prestige and becomes the King's chief minister. With the young Clarence, he secretly builds schools, factories, telegraphs, and an educated technical class while publicly participating in knight-errantry. He marries Sandy and tries to teach Arthur about ordinary life by traveling with him in disguise; both are captured and nearly sold as slaves. Hank's reforms transform parts of the kingdom but depend on his personal control and cannot overcome its political and religious foundations. When the affair of Guinevere and Launcelot destroys the court, Arthur and Mordred die in civil war and the Church turns the country against Hank. His small modern force exterminates the attacking knights with mines, guns, and electric fences, then becomes trapped by the destruction. Merlin enchants Hank into a thirteen-century sleep. Returned to the nineteenth century, Hank dies longing for Sandy, their child, and the lost world of Camelot.

Hank Morgan, a factory superintendent from Connecticut, is struck on the head during a fight and awakens in a landscape he gradually recognizes as sixth-century Britain. Sir Kay captures him and takes him to Camelot, where Hank is displayed before King Arthur's court and condemned to die. A young page named Clarence tells him the date. Remembering that a solar eclipse is due, Hank claims power over the sun and times the eclipse as proof of his magic. The terrified court releases him and grants him authority second only to Arthur's. His manufactured miracle displaces Merlin as Camelot's chief wonder-worker and gives Hank the opening from which he plans to remake the country.

Now called the Boss, Hank turns his knowledge into political power. He destroys Merlin's supposedly enchanted tower with explosives and begins a concealed program of schools, workshops, communications, and industrial training. He wants representative government and modern production, but works through Arthur's absolute authority and keeps most innovations hidden until they are secure. Court custom also draws him into personal rivalries, including a future contest with Sir Sagramor. When Sandy asks him to rescue imprisoned noblewomen, Hank accepts the adventure, partly to establish that his methods can outperform traditional knighthood.

Traveling with Sandy, Hank repeatedly discovers that the language of romance disguises ordinary or absurd realities. The supposed ogres and captive princesses of Sandy's tale prove to be swine, though Hank completes the rescue in a way that preserves her understanding of events. At Morgan le Fay's castle, he sees royal power exercised through arbitrary imprisonment and death. His efforts to intervene expose a central obstacle to reform: cruelty is embedded in accepted law and rank rather than confined to a few villains. Hank and Sandy continue together, and their partnership becomes a lasting personal attachment rather than a single knightly errand.

Hank expands his reputation by applying practical knowledge where the court expects sorcery, including restoring a supposedly miraculous fountain. His network now includes trained young people, factories, newspapers, and lines of communication that quietly connect the kingdom. He and Sandy marry and have a child, while Hank's public role still requires him to challenge the culture of knight-errantry on its own ground. In a tournament he defeats armored opponents with methods and weapons they do not understand, demonstrating both the overwhelming advantage of modern technology and his willingness to use it theatrically. His material revolution is advancing faster than any corresponding change in the population's beliefs.

Hank persuades Arthur to travel among his subjects in disguise so that the King can experience the conditions hidden by court ceremony. Arthur struggles to abandon the speech and assumptions of royalty. Among poor families and laborers, the two encounter illness, hunger, rigid class distinctions, and laws designed to protect privilege. They are eventually seized and sold as slaves, where Arthur's instinctive sense of dignity repeatedly endangers them. They escape execution only when Hank's organized forces arrive. The journey changes Arthur's knowledge of his realm, but it also shows Hank that information alone cannot easily undo institutions that nearly everyone has been taught to regard as permanent.

After returning to power, Hank uses a final public contest with Sir Sagramor to discredit armored chivalry, defeating the knights with firearms when they refuse the lesson of his earlier weapons. He later leaves Britain with Sandy and their sick child. During his absence, Guinevere and Launcelot's relationship becomes public, the Round Table breaks apart, Arthur fights Mordred, and the Church turns against Hank's reforms. Arthur and Mordred die, while Hank and Clarence withdraw with a small band of trained followers to a cave defended by mines, guns, and electric fences. At the Battle of the Sand Belt, their machinery kills the attacking knights in enormous numbers, but disease and the surrounding dead trap the defenders. Merlin enters in disguise and casts a thirteen-century sleep over Hank, then dies by accidentally touching a live wire. Hank wakes in the nineteenth century and eventually dies while calling for Sandy and their child, emotionally stranded in the world he could not save.

After the exposure of Guinevere and Launcelot's relationship, Arthur's realm collapses into civil war and the Church places Hank's modernized kingdom under an interdict. Arthur and Mordred kill one another, while the surviving forces of chivalry turn against Hank's small technical elite. Hank and Clarence retreat with loyal youths to a fortified cave protected by mines, guns, and electrified fences. At the Battle of the Sand Belt, their machinery annihilates the massed knights, but the victors are trapped behind heaps of bodies that spread disease and make escape impossible. Merlin enters the cave disguised as an old woman and puts Hank into an enchanted sleep meant to last thirteen centuries; while celebrating, Merlin accidentally touches an electric wire and dies. Hank wakes in his own nineteenth century, but Camelot remains more real to him than the present. On his deathbed he calls for Sandy and their child, believes he is back in Arthur's world, and dies reaching for the family and age he lost.