Gu Xuejiao (played by Sun Zhenni) is unexpectedly reborn in her senior year of high school, carrying the regrets of her previous life. In order to make up for the regrets in her life, she decides to turn her love brain into a career brain, and uses the help of Lin Zhihua (played by Chen Jingke), a high school student in Kochi, to make a breakthrough.life, and achieved a sweet love that runs in both directions and is a variable for each other.And their friends Yi Tianyu (played by Yuan Dasen), Zhou Shiyun (played by Tu Zhiying), Gu Mingze (played by Wu Chongxuan), Gao Rui (played by Ge Qiugu), Lin Zhiyue (played by Tian Yitong), Lin Jiadong (played by Kuai Jiale),Sun Tiantian (played by Zhang Zhang) and others also staged their own life stories that were very different from the past in their "Do Again".