陆丹丹，今年十一岁，是一个五年级的学生，喜欢手工折纸，生活在一个单亲家庭里。她一直不理解做老师的妈妈为什么对自己那么严厉，她感到十分委屈。在母女关系稍微缓和时，妈妈又忽然要带她去见一个陌生的叔叔，她很害怕有陌生人介入她和妈妈两个人的生活。她越来越叛逆，和妈妈、别的老师以及那个叔叔作对，目的就是要惹恼妈妈，闹出了很多让人哭笑不得的事情。最后，因为一个契机，她学会了理解与原谅，真正地成长起来。小小女孩有哪些不愿明说的心事？单亲家庭中的母女矛盾如何化解？亲人之间如何传递爱和感恩？调皮可爱的小主人公陆丹丹用她的亲身经历诠释了成长的烦恼与欣喜。（Lu Dan Dan, 11 years old, is a fifth-grade student who likes hand-origami and lives in a single-parent family. She did not understand why her mother, a teacher, treats her so harsh so she felt very wronged. When the mother-daughter relationship is slightly eased, her mother suddenly takes her to see a strange uncle, she is afraid of the fact that a stranger would involve in her and her mother's life. Then, she becomes more and more rebellious and always sets herself against her mother, other teachers and that uncle to annoy her mother and make a lot of dumbfounding things. Finally, because of an opportunity, she learns to understand and forgive and really grow up. What kind of things do the little girls not want to tell? How to resolve the mother-daughter contradiction in single-parent families? How to pass the love and gratitude between family members? Naughty cute little heroine Lu Dandan use her personal experience to explain the growth of the troubles and joy.）