Heidi, is an orphaned girl first raised by her aunt Dete in Mayenfeld, Switzerland. To get a job in Frankfurt, Dete take 5 year-old Heidi to her grandfather, who lives in seclusion on the alm and it thus know as Alm-Öhi (“Alp-grandfather” . He at first resents Heidi’s arrival but the girl manages to penetrate his harsh exterior and subsequently has a delightful stay with him and her best friend, young Peter the goat-herd. Dete returns 3 years later to bring Heidi to Frankfurt as a companion of a 12-year-old invalid girl named Clara Sesemann. Heidi spends a year with Clara, clashing repeatedly with the Sesemanns’ strict housekeeper Miss Rottenmeier, and becoming more and more homesick. Her one diversion is learning to read and write, motivated by her desire to go home and read to Peter’s blind grandmother. Heidi’s increasingly failing health and several instances of sleepwalking (it is implied that she has inherited a propensity to epilepsy from her mother) prompt Clara’s doctor to send her home to her grandfather. Her return prompts the grandfather to descend to the village for the first time in years, marking an end to his seclusion. Heidi and Clara continue to write to each other. A visit by the doctor to Heidi and her grandfather convinces him to recommend that Clara journey to visit Heidi. Meanwhile, Heidi teaches Peter to read and write. Clara makes the journey the next season and spends a wonderful summer with Heidi. Clara becomes stronger on goat’s milk and fresh mountain air. Peter is jealous of Clara and pushes her wheelchair down the mountain to its destruction. Without her wheelchair, Clara attempts to walk and is gradually successful. Clara’s Grandmother and Father are amazed and overcome with joy to see Clara walking. Clara’s wealthy family promises to provide for Heidi, in case her grandfather will no longer be able to do so.