This film tells a painful love story of four teenagers. The seventeen-year old LI'er is an introvert girl whose left ear suffers from poor hearing. One day, she suddenly expresses her love to XU Ge who, however, becomes the boyfriend of an outgoing girl, Bala. Li makes friends with Bala and meets ZHANG Yang whom Bala really loves by chance. Later, Bala dies in an accident and Li finally falls in love with Xu.