Cheng Tian-xiang, a cheerful tennis enthusiast, meets the aloof CEO Lin Xiao-nan while helping his younger sister, Lin Xiao-ruo. Despite Lin Xiao-nan's cold exterior, Cheng Tian-xiang's sincerity slowly breaks down his defenses, turning their antagonistic relationship into a budding romance. However, past relationships and new emotions complicate their journey. Can they overcome the barriers around their hearts and find happiness together?