This book details the challenging mission of Earth agents on the planet Arkanar, which possesses a social structure analogous to Earth’s Middle Ages. The protagonist, Anton—operating under the identity of Don Rumata—is forced to play the role of an aristocrat. He observes society's progression while remaining aloof from cruel and unjust events, careful not to reveal his true nature. He faces a profound moral dilemma: whether to participate in the planet's history or remain a detached observer.