"I have always known that I am a snail without a shell. I crawl slowly and painfully, but I just want to find a shell." This is the inner monologue of a young girl. She is weak, fragile, sensitive, yet strong. Many people laughed at her, but many others were jealous of her. She was confused about family, friendship, and love; Polygonum multiflorum, Zhang Ye, and Ye Cheng, who was the shell that could give her warmth no matter how strong the wind or rain was?