Young-sil and Insik become lovers eight hours after meeting. Insik is certain that Young-sil is a free spirit. Anxious Insik makes Young-sil promise that their love will be forever, whatever happens. Young-sil tries to keep the promise, even after their breakup. 8 years later, Young-sil likes Woodo, but is unable to do anything.

Sook-kyung, the youngest tomboy princess, loves playing hide and seek with her same-aged court ladies and is extremely curious about the life outside the palace. An opportunity comes for her on queen mother’s birthday celebration. Princess Sook-kyung gets to explore the outside world with the help of her older sister princesses and falls in love with a Seonggyungwan scholar she meets coincidentally. The variety of character twists in this film which is reminiscent of romantic comedies such as Roman Holiday and Shakespeare’s Twelfth Night. The queen mother with a fancy royal costume but wears glasses because of her poor vision, and the court ladies who protect the princess day and night are usually slow and doze off but have the strength to push against male henchmen. The princes outside the palace walls seem like that of a naïve country girl who eats a rice cake at the marketplace because she thinks it’s free.

The movie follows a series of twists surrounding a child's paternity after a mother unknowingly becomes pregnant.