In order to protect her granddaughter Lu Tong, who was being bullied, 68-year-old Xu Fengqin put on her school uniform and returned to her senior high school class. When faced with the arrogant school bully Yang Yuxin and his associates, she adopted the attitude of "not causing trouble but not afraid of it". From having her monthly exam results tampered with to outsmarting the principal in the broadcast room, Xu Fengqin used her strength to prove that age is just a number, and being cool is a lifelong thing...
