Chae-kyeong, after making her morning calls to the elders of the royal family, is surprised to see Yool inside the palace. Yool, a transfer student in her class, turns out to be prince Ui-seong. At first Chae-kyeong has a hard time adjusting to life in the palace with its strict education and rules, but thanks to the warmth of the emperor and other elders at the palace she starts to find the royal culture attractive. Meanwhile, Hwa-yeong prepares to open a yoga center while plotting with Choi against the other royal family members, while Yool gets closer to Chae-kyeong and her friends. Prince Shin's birthday is coming soon, and Chae-kyeong starts to get excited about the birthday party, but the only people awaiting her are Shin's friends, who despise her, and Hyo-rin...