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Ping An is an autistic teenager who gains recognition for being a badminton prodigy. Zihao is his younger brother and a fellow badminton player. Xiao Na is a bright and cheery young woman who helps out at her grandpa's badminton court for the summer. She gets close to both brothers and becomes attracted to Zihao. However, their journey is not as smooth-sailing as they'd hope and the two brothers are pushed to a difficult crossroad.

Young Heidi is sent to live with her grandfather in the mountains where she discovers the liberty and the beauty of Swiss landscapes. Later when Heidi is forced to become a companion to a young invalid girl in a big town, she discovers just how much she misses the mountains, her grandfather, and her friend Peter.