Zhang Guimei (played by Song Jia) is an ordinary female middle school teacher in the mountainous area of ​​western China. Over the years, she has witnessed her female students dropping out of school due to family poverty, getting married and having children, or going out to work when they were 15 or 16 years old. This made herZhang Guimei is extremely sad and regretful.She is determined to run a free high school for girls so that these girls in the mountains can have the opportunity to receive an education, go to college, get out of the mountains, and completely change their destiny.In 2008, the only all-free girls' high school in China was established. Under the difficult situation of no teachers, no students, no funds, and no experience, Zhang Guimei led the teachers and students of the girls' high school to complete the impossible task: making the learning foundation extremely backward.All female high school students have been admitted to university.This girls' high school has allowed batches of girls to come out of the mountains and change their destiny.However, as the school develops, more and more poor girls from the mountains come to apply for the exam, and new problems and difficulties also arise...