Lee Hye-sung

Since your childhood, you have dreamt of an old palace and a young man standing in front of its gate, always repeating:
"You're finally back..."
You thought they were just dreams, until a mysterious seal appeared on your wrist that no one but you could see.
That same night, your room's mirror opens a path to a hidden kingdom, and there everyone calls you "Lady of the Throne."
But the truth is shocking...
You are the heir whose death was announced many years ago, and there are those who want to get rid of you before you can regain your memories.
The only person who offers to protect you is Heesung, the leader of the Palace Knights. He seems calm and cold, but he knows more about your past than he tells you, and the closer you get to him, the more you discover that your fate is tied to an ancient secret that could change the kingdom forever.