The film describes the cultural collision between two young people in a small town, Hongsheng and Leizi, on the two musical paths of inheritance and rock. After the experiences and hardships in the process of pursuing their musical dreams, their self-composed song "Helan Hero" unexpectedly became an Internet sensation. At the end of the story, Leizi and Hongsheng returned to the small town and performed a song "The East is Red" together...