Lin Bei Xing, a woman about to enter ther thirties. She's about to get married to her high school sweetheart Zhan Yu but he asked for a break up all of a sudden. In the last ditch attempt to save the relationshi, she texted Zhan yu to meet her at the high school they attended, to reminisce the old time and hope Zhan Yu will remember their good old days. As she fiddles with her old phne it glitches and deleted an ol message in the phne, she then got transported to 2010 which is the year of college entrance exam. There, Zhang Wan Sen appeared to hold an umbrealla for Lin Bei Xing, and along the way she met Zhan Yu too. Lin Bei Xing went home not realising she have time travelled until her friend sent their high school graduate class photos. She started to feel that something is off, and come to realisation that when her phone messages were deleted she seemed to have time travelled, so she decided to try again and viola shes back to 2010. She decided to use this opportunity to change her life, but her time travel seems to get interrupted everytime when she heard about Zhang Wan Seng's death. She started to get curious about Zhang Wan Sen and wanted to protect him , as she believe as long as he is protected, she will have more time to stay in the past to change her life. But little did she know that Zhang Wan Ssen have always liked Lin Bei Xing, and have always been the one protecting her. Watch to follow their stories!