The Sudden Pianist is the remarkable story of composer and pianist Michael Hersch. While much has been written about Hersch's gifts as a composer, his abilities at the piano have been witnessed by few, as he shuns most public performances. Filmmaker Richard Anderson has created an intimate portrait, shedding light on this aspect of Hersch's music making with never before seen or heard footage of Hersch performing his own work at the piano - from his debut to the present day. There are also rare interviews throughout with Hersch. The film is a moving journey into the mind of one of America's most unique artists.