In the Joseon Dynasty, a mysterious creature called 'the ghost' haunts the capital. A young man named 'Baekin' (literally 'White Hair') encounters this ghost and, while initially frightened, becomes involved in a series of strange events. The ghost reveals a secret wish to Baekin, but its true intentions are shrouded in mystery. As Baekin gradually learns more about the ghost's past, he finds himself facing dangerous challenges and must unravel the truth behind its existence. The story follows Baekin's journey as he risks everything to help the ghost, even though its motives remain unclear. Meanwhile, Baekin's growing feelings for the ghost intensify, leading to a heart-wrenching romance...