Feng Yifan is poor. His wife gives birth to their fourth child on a stormy night, but the baby is ugly. The impoverished family struggles through hardship, while paper airplanes carry the purest feelings and the most beautiful years of youth, flowing by like water. A nursery rhyme runs through the entire novel, from the slums to the hospital corridors. The laughter brings back memories of that boy from summer vacation in childhood, and leaves readers in tears.