Zheng Huaisu is a cold beauty. Once she went to attend a high school reunion, and unexpectedly she reunited with Qi Rang, the school sweetheart at that time. They had been rumored to have an affair in high school.
Twenty years have passed. School beauty Zheng Huaisu has been divorced and has been alone for many years. Qi Rang is also divorced with a boy. After the class reunion, Qi Rang sends Zheng Huaisu back. Zheng Huaisu gets off the car early and returns to the community. When she returns home and wakes up, she finds that she has gone back to twenty years ago.
Zheng Huaisu wanted to change the fate of his mother who died of cancer, study hard to get into a good school, and stay away from his cheating ex-husband, but Qi Rang kept making trouble, which annoyed Zheng Huaisu.