This book tells the story of an innocent and kind little girl Heidi. She loves life, nature, charity and helping others. Although she is very young, she has a very touching charm. It is under the influence of her sincere feelings that her grandfather, who has experienced vicissitudes and is depressed and withdrawn, rekindled the light of life. It was with the help of her love that Clara, who was sickly, summoned up the courage to live, strengthened her confidence in overcoming her illness and finally stood up again. Grandpa Heidi, who is indifferent in appearance and kind in heart, educates Heidi in the unique way of mountain people, while Heidi warms her cool heart with pure love and changes her lonely and indifferent character. The book also tells the story of Peter, a shepherd boy who likes herding and playing, but doesn't like studying, and his poor blind grandmother who longs for a better life. Under the influence of Heidi, Peter gradually likes studying and becomes an honest child. Peter's blind grandmother gets happiness and fun from Heidi's care.