The story begins in the Ultimate Class. Xiaoyu meets a girl he really likes. In order to restore her memory, he does not hesitate to travel through water time and space to find her lover in that time and space - Xia Zhi. Xia Zhi is a very sensitive and delicate girl. She falls in love with the man with a dazzling aura - Yan Yalun. Together with him After experiencing so many storms, she was still not sure whether she could walk into his heart. And Aaron, because of that car accident, lost his beloved, can his closed heart be resurrected? She said, "My heart is very small, so small that it can only hold one person. So, if you love, please love deeply, if not, please leave."