A story about young love that follows a group of students into adulthood and their dreams about the future. When Xu Yong Xin runs into her old high school classmate, Zheng Da Wei, it stirs up bittersweet memories from their school days. Yong Xin remembers a time when she was just a bookish student who kept herself to herself, until a chance encounter introduced her to Gao Yu Xuan, Zheng Da Wen and Zheng Da Wei. The four once-inseparable friends changed and grew apart as time went on.