The story takes place in the fairy-tale-like Green Light Forest. The beautiful and kind girl Sophie (played by Liu Pinyan) is the only daughter of a musical family and has always lived a happy life. The driver of the Su family was unfortunately killed in a car accident. The Su family adopted his daughter Luo Shan (played by Song Ji-ae) and renamed her Susan, treating her as their own. Susan is inferior and strong-willed. Not only has she always been jealous of everything Sophie has been born with, but she has also developed a love for Jin Owen (played by Ruan Jingtian), who has been a childhood sweetheart with Sophie. At the Spencer Royal Academy of Music, Sophie met Prince William Spencer (played by William Li). When she grew up, Sophie became a teacher at Green Light Elementary School, Susan became the artistic director of the Spencer Academy of Music, William returned to China to inherit his father's music academy Spencer, and Owen returned after completing his studies to become a world-famous violinist. However, Spencer Academy wants to close Green Light Elementary School. Sophie, who has a deep affection for Green Light Elementary School, struggles to protect Green Light...