In the Midnight Kingdom, there is a beautiful and intelligent Princess Carolina, but under the control of the 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 travels to the mysterious Midnight Kingdom. With music, flowers, and sincerity, Carolina reopens her heart to Benjamin. To break free from control, they are about to embark on a thrilling adventure.