In this novel, Mark Twain sends his character as much in the 6th century. He miraculously remains alive and is not lost in the crowd of wandering knights. Reason, scientific approach to life, knowledge of many discoveries made in 13 centuries after, the desire to build a world in which all are free and equal, the struggle against the church and its attempts to turn people into silent subordinates, softening the monarchy ... And all this falls to the lot of our hero - a typical Yankee from Connecticut, who fell in the era of King Arthur.