In the year 2020, the 28-year-old Nan Xiang Wan is already the HR director of an world-renowned company. At the same time, she is heavily biased towards having academic qualifications. While she may seem to be at the top of her game, her heart is full of anxiety. A high-intensity psychotherapy brings Xiang Nan back to a memory from ten years ago where she relives life as a high school senior.

Xiang Wan has a hard time integrating into Class 7. In order to ensure that she can be admitted to Guanghua University once more, she has no choice but to solve every problem that comes her way from her classmates who keep interrupting her studies to facing her father whom she once hated and dealing with unbearable memories from the past. In the process, Nan Xiang Wan gradually becomes friends with physical education student Lin Xiao Ran. Through the relationships that she forges, she begins to realize that grades are not everything.