This is a story about a young girl Su Yan. There are tiny memories hidden in the September wind. The swallow's nest under the eaves of her grandmother's house, the creaking old wicker chair, and the traces that have been quietly taken away by time have become the soft corners of Su Yan's heart. An unfinished essay, a sycamore leaf picked up by chance, is like a key, gently opening up her longing for the past and the courage to express it. There is no grand plot in the story, but it contains the most delicate thoughts of adolescence - about the weight of memories, about the small but important decisions in growing up, and the warmth and strength hidden in the daily details. In her dialogue with the past, Su Yan will slowly learn to embrace those seemingly lost fragments and find her own way of expression.