Story of a little girl, Heidi, who lives a happy life in the mountains of Switzerland with her grandfather. She's sent off to live with a family in Frankfurt in order to attend school. The family's daughter Clara is sickly and Heidi misses her mountain home so much, she becomes pale and weak herself. Heidi begs to return home and the family sends her back along with their daughter Clara, and the fresh mountain air works wonders for both girls.