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Olga is eight years old. She loves her mum, singing lessons and swinging and sometimes bakes muffins with her friend Evelina. Shortly before her ninth birthday, Olga's life suddenly changes. Her mother is admitted to hospital, so Olga has to live with her aunt and uncle, get used to someone else's house and new rules, and get along with her six-year-old cousin, who is not happy to have a guest . And there are new unexpected discoveries and big changes ahead.