The novel takes place in Seoul, Korea’s capital, in 1473. As a historical novel, Park adapts true events and personas for her fictional story. From 1392-1910, the Joseon Dynasty ruled Korea, the first king of which was Lee Seong-gye. For three generations, these kings established a social order in which royalty had utmost authority. However, Joseon also saw benevolent rulers whose priority was education, and during the 15th and 16th centuries, arts, science, and technology dramatically advanced.

In the author’s note, Park explains that the “boy-King” in the story is based on King Seongjong, who ruled from 1469-1494. Seongjong was 12 years old when he was crowned, so his grandmother, mother, and aunt ruled in his place until he turned 19. During his reign, the economy flourished, and he expanded several offices in his court to offer more checks and balances. As an intellectual, Seongjong valued differences in opinions, and appointed administrators to his court regardless of their political views.