Yi Kwang-su is regarded as a pioneer of modern fiction and a leading voice in modern Korean literature. His works criticized the irrationality of the old conventions shackled by Confucian traditions while advocating the enlightened views of his age. “Gasil” is a story based on the tale of “Seol’s Daughter and Gasil” appearing in The History of the Three Kingdoms, which deals with the moral and heroic acts of a young man. To keep his promise to Seol’s daughter, Gasil faces danger in ferocious battles and overcomes the temptation from his master’s daughter.