During the summer vacation of her freshman year, Xia Lemon went to the United States to visit relatives and study abroad. She met Xu Haiqiao, an Italian-Chinese who runs a wine business in the United States. Her purity and loveliness, his arrogant and resolute aristocratic temperament, and their touching hearts will never be separated for the rest of their lives. Xia Mengmen thought her luck would last forever, but Xu Haiqiao left her forever in a plane crash. However, Xu Haiqiao's body was not dead but was incomplete. It's just that he loves Xia Lemon too much and wants her to get the most perfect love. But he is no longer the best, so he hides the truth about his survival and reluctantly lets her find someone else's arms and lick her wounds secretly. But Xia Mengmeng loved him to the bone, and the pain she felt was not as painful as hers. Five years later, she still couldn't let go of their love. She had to spend her whole life waiting for Xu Haiqiao who missed him... Will they still meet in the vast sea of people?