The Book of Konstantin Ivanov is a kind of guide to medieval life. Carried away by the author, the reader studies the structure of the castle, walks along the narrow city streets, looks into the pharmacy, the laboratory of the alchemist and the shops of artisans, penetrates the meeting of the city council, participates in the trial, finds himself at a feast in the baronial castle and learns a lot of curious things about the menu and decoration of the table, present at knighting, unexpectedly complicit in a crowd of self-scourging religious fanatics, gets acquainted with robbers and the Inquisition, visits the house of a wealthy city dweller and a peasant farmstead, receives invitations to knightly tournaments, weddings and village holidays, has fun playing stray actors - in a word, gets into the cycle of everyday life of the Middle Ages...