Betrothed to Crown Prince Yeon (Taeyeon), Lady Sooyeon (Jessica) finds herself unravelling many of the Crown Prince's secrets.  Secrets she can use to unbind the knot she has with the Crown Prince and to marry the one she truly loves.  But will she?

(Disclaimer: I am no expert in history and only have historical-Korean-dramas knowledge (lol), thus I will ask for fellow readers' consideration for the mistakes, misconception, or misuse of words, settings, names, traditions and other misuse of historical aspects in this story.)