Branch Secretary Tian Ying leads her classmates in signing up for the "Up to the Mountains, Down to the Countryside" movement. Yue Chengli, a music teacher of undesirable class background, secretly teaches Yang Xiaoming to play the violin, encouraging him to pursue fame and success. This causes Yang to become unwilling to participate in the movement. With the support of the Party branch and the Workers' Propaganda Team, Tian Ying investigates the situation. Yue Chengli is subsequently criticized on charges of "co-opting and corrupting young students, and sabotaging the Up to the Mountains, Down to the Countryside movement." Yang Xiaoming also learns a lesson from this experience.