Due to the sabotage that was held by the queen dowager Yoon, who seeks great lust for power, and Daehyung Yoon, who is a royal relative my marriage, the king's beloved half brother prince Uiseong gets killed falsely charged as treason. 

Nok-yeong senses a myserious energy from the two kids in front of the palace. The queen dowager orders her to look into the fortunes of princess's friends, so that a future queen can be selected.