Gong-shil is a term from Korean culture that refers to a ghost or spirit. It is often depicted in folklore and popular media, representing the souls of the deceased who have not yet moved on to the afterlife. In many stories, Gong-shil can interact with the living, sometimes providing guidance or warnings. In modern times, Gong-shil has gained popularity through various forms of entertainment, including films and television dramas. One notable example is the hit series The Master's Sun, where the main character can see and communicate with these spirits, leading to both comedic and emotional situations.