Bo He (Sun Qian) is a TV host. The show "Classmates Reunion" hosted by her has a high popularity and ratings. One day, her boss Yu Tian (Li Tai) found Bo He and hoped that she could find a group of college classmates from fifteen years ago and make a special program based on their real experiences. Although Bo He had cut off contact with her classmates since graduation, "military orders are like mountains", Bo He had to bite the bullet and agreed. Fifteen years have passed like a white horse passing by. Now the former classmates and friends meet again. In addition to happiness, they are inevitably full of emotion and a touch of sadness. What puzzled everyone was that Bo He was unwilling to contact her old girlfriend Ziyuan (Tang Jingmei), and this reunion made a secret that Bo He had buried deep in her heart gradually surfaced.