The heroine Lin Nian has been secretly in love with Lu Chen, the favored man of heaven, for four years. After becoming his girlfriend as she wished, she has always been the humble and contributing party in the relationship. In the indifference and contempt day after day, she exhausted all her enthusiasm. When she went to him happily with the news of her pregnancy, she saw that he had a new love by his side and was publicly humiliated by him for "using a child to touch porcelain." At this moment, her four-year love completely died. She left a paper airplane symbolizing love and farewell and disappeared from his world. When the male protagonist Lu Chen got used to her existence and thought she would come back as before, he found that she was really missing this time. In the huge void and search after the loss, he began to face his feelings, only to find that he had already fallen deeply into it unknowingly, and the girl who once had eyes for him had moved towards a future without him without looking back.