Orphan Heidi (Anouk Steffen) is sent to the Alps by his aunt Deiti (Anna Sheens) to live with his grandfather (Bruno Ganz), who lives alone in the mountains far from town. The lively Heidi is like a fish in water here. She not only gains the friendship of Peter (Quilin Agripi), the shepherd and the affection of her lonely grandfather, but also integrates with Peter's family at the foot of the mountain. One day, Heidi and Peter were herding sheep on the mountain when their aunt suddenly appeared and coaxed Heidi into selling them to Zesseman's house in Frankfurt. From then on, Heidi, who couldn't read A, became a reading companion to Miss Clara (Isabel Ultraman). Clara lost her mother when she was a child. After a serious illness, she could no longer stand. She could only be trapped in a mansion with a wheelchair. Her father (Maxime Memmet) rarely comes home from home all year round, and the lonely Clara regards Heidi as a lifeline. Can Heidi adapt to the Zessemans 'new life? Will my grandfather and Peter, who are far away, see each other again? Is there any hope for Clara's legs to get better?