The Gong and Zhang families have been good friends for many years. Therefore, both families decided that their children should marry each other once they grow up. Gong Jun and Zhang Zhehan were introduced to each other as children. They were told that they were soon-to-be engaged, and that they should get along with each other. However, for a reason even he did not know, Gong Jun was unable to stand the side of his future fiance and left him on the spot. Yet unable to go against their families' wishes, their dysfunctional relationship continued until one day, Gong Jun committed an irreparable mistake that caused Zhang Zhehan to disappear from his life - and only then did he finally realize how he truly felt toward that person. Ten years later, fate brings them to meet once more.