This is a full-length novel about the conflicts and contradictions experienced by the main character (Lee Ham) who is a descendant of a pro-Japanese family as he tries to be atoned for the shameful family history. The author Park Jungsun states that she was motivated to write this noble because “the wings of birds gave pressure on my calling as a writer”. She elaborated this by saying that she felt frustrated at the society who are not giving due respect to the descendants of independence fighters due to the remnants of ideology while watching birds that could flying high up in the sky by freely flipping both their left and right wings.