In the Midnight Kingdom, there is a beautiful and intelligent Princess Carolina, but under the control of an evil minister, she becomes arrogant and conceited. King Benjamin of the Sun Kingdom is young and wise. After seeing the princess's portrait, he is deeply attracted to her. In order to win her heart, Benjamin goes to the mysterious Midnight Kingdom. Accompanied by music, flowers, and sincerity, Carolina reopens her heart to Benjamin. In order to get rid of control, they are about to embark on an exciting adventure.