Little Susi, blind from birth, and no one willing to adopt her, lived in an orphanage in the Bavarian Alps. But she had an imaginary playmate, Grulla, who kept her company. Then one night, Grulla took form, told her he was going away, but would return with a surprise. Soon a couple came to the orphanage to adopt and chose Susi: the couple was named the Grullas, and the husband was an eye surgeon!