After five years away from the education industry, Hao Nan returns to teaching after running a failed shop. Eighteen-year-old Ren Zhen, who failed the entrance exams due to her unreliable father, meets a similarly disillusioned Hao Nan on the rooftop, but Hao Nan encourages Ren Zhen with his own personal experiences. Coincidentally, Hao Nan, who becomes the Head of the Senior Class 14 at Qingyun High School, meets Ren Zhen, who is new to the class, again. In the following days of preparation for the entrance exams, Hao Nan and the students in his class go from mutual incomprehension to understanding each other. Thanks to his efforts, the youngsters, who are looking forward to their future, gradually open their hearts and begin to trust this special teacher.