Based on an operetta by Franz Schubert, the film is partially biographical. Franz (Karlheinz Boehm) is in love with Hannerl (Johanna Matz) but is too shy to reveal his feelings. After composing a love song, he engages a young baron to sing to her. Hannerl instead falls in love with the baron. The girl's parents lament over the problems of Hannerl and her two sisters, who are all young women living at home and eligible for marriage. Beethoven (Ewald Balser) and legendary music publisher Diabelli (Richard Romanowsky) are Schubert's famous contemporaries, giving historical perspective to the three music legends. ~ Dan Pavlides, Rovi