Soobin was a knight that protected you thousands of years ago. You loved him but your love for him was forbidden as he doesn't have royal blood, causing your relationship to be a secret. During a huge war against an opposing kingdom, Soobin fell in the war and you were devastated by his death. The last thing Soobin had wished for before he took his last breath, was to see you again in his next life and to be able to love you without having to keep it a secret.