Ji'an City, located in the northeast, once became a nationally famous rock city because of the Broken Guitar Band, and also inspired the music enthusiasm of countless young people and children. However, twenty years later, rock gradually declined, and even the famous symbol of Ji'an, the big guitar, faced the fate of demolition. In order to protect the rock soul here, the owner of the auto repair shop Hu Liang (Qiao Shan) invited the former Broken Guitar Band's agent Cheng Gong (Dong Chengpeng) from Beijing, hoping that the other party would help him form a band and plan a performance to guard the big guitar. Under Hu Liang's soft and hard grinding, Cheng Gong and his team pieced together the beautiful female bassist Ding Jianguo (Gulinaza), the drummer Explosive (Li Hongqi) with his back to the audience, the elderly doctor guitarist Lao Yang (Han Tongsheng) and the underage elementary school keyboardist Xixi (Qu Junxi). They overcame their respective difficulties, worked hand in hand towards their musical dreams, and always kept the original passion in their hearts...