A girl takes care of a caterpillar every day. They play, read, and laugh together. The caterpillar turns a butterfly. One day, when they are reading, the girl turns to a page printed with flowers. The butterfly happily lies on it. Suddenly, the book is closed ...毛蟲不小心從樹上掉下來,小女孩救了牠。每天,小女孩悉心照顧毛蟲。她和毛蟲一起玩耍,一起歡笑,還一起看書。對於牠的成長過程:毛蟲結蛹,破蛹成蝶,小女孩瞭如指掌。一天,她閱讀圖書,蝴蝶如常陪伴左右。小女孩翻開印有花朵的書頁,蝴蝶開心地躺在上面。一剎那間,書本合上了……