Set during the Joseon period, when the people faced severe hardships due to the Qing invasion (January 3, 1637, to February 24, 1637). Against this backdrop, a love story blossoms. Lee Jang Hyun (Namkoong Min) is a mysterious man who suddenly appears in high society. He seems cheerful, but in reality, he is not. He is a complex individual with a deep, dark secret he cannot reveal to anyone. A woman named Yoo Kil Chae (Ahn Eun Jin) appears before him, and his life changes. Yoo Kil Chae is the daughter of a noble family. She is a lovely woman, full of confidence. As she experiences the upheaval caused by the Qing invasion, she falls in love with Lee Jang Hyun and grows as a person.