She accidentally enters the imperial palace, hoping to live quietly without involving herself in worldly affairs, but a snowstorm brings her to the emperor's attention. Within the palace walls, gentleness is her armor, and yielding is how she survives. An old case lies shrouded in mist, and those from her past have gone far away. Everyone believes she has disappeared into the past, yet she assumes a new name and identity and rises again in a distant place. Years later, she returns, but the mysteries of those days remain unsolved. The person who has always refused to let her go is still waiting for her beneath the lamplight. The road through the deep palace is long. This time, can she protect the wish in her heart and uncover the truth behind the events of the past?