The film reveals the extraordinary story of Fanny, a composer long ignored by the classical music world in favour of her famous brother Felix, who despite being forbidden a musical career persevered, composing 450 works in her short life. Fanny’s lost masterpiece, 'The Easter Sonata', is brought to life by virtuoso pianist Isata Kanneh-Mason. As she explores the music, the parallels between her life and Fanny's – including the challenge of being a pioneer with few role models in classical music -- become clear.

Fanny's 3x great-granddaughter, Sheila Hayman, writes and directs the film, shot on location with an all-female crew in Berlin, New York, London, Oxford and Buckingham Palace and featuring many never-before-heard or recorded pieces from Fanny Mendelssohn.

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