Heidi is a young orphan sent to live with her grandfather in the Swiss Alps. At odds with his community, Heidi's grandfather has been living in seclusion for years and, at first, resents her arrival in his life. But it does not take long for Heidi to crack his rough exterior, and soon they are living a happy life along with Heidi's best friend, Peter. But when her strict aunt decides to send her away again, Heidi becomes determined to return to her idyllic life with her grandfather.