Xiaoying is mute. God decided that she would not be able to communicate with others since she was born, resulting in her withdrawn personality. She has no friends and therefore always feels lonely. She always fantasizes about someone who can accompany her, who will not look down upon her muteness, who will walk hand in hand with her in the park, who will also sit quietly with her and have heart-to-heart communication with words on paper. One sleepless night, with the full moon in the sky, a boy with wings knocked on Xiaoying's window. This is a story about love, but about the moon.