Yayun has been living with her parents' quarrels since she was a child. She is independent and free-spirited, but she never knows why her parents quarreled. At the beginning of his freshman year of high school, he met his lifelong friend Xiao Meng, Xiao Xiao who gave everything for her, and Mo Yufan who changed his life. One day, when she knew the whole truth, everyone who loved her was lost...