High school student Zhou Zhihua met his senior sister Xiao Jianqiu, who was three grades above him, and began a long period of unrequited love amidst the nagging of his teacher. More than ten years later, Zhou Zhihua, who was in his prime and high-spirited, unexpectedly met Xiao Jianqiu, a married woman who was at a low point in her life. In their subsequent interactions, the two deepened their understanding, appreciated each other, supported each other, and developed a deep relationship. What will be waiting for them?