Jenny is young but her life is over. She has been locked up in a women's prison for killing someone, and she would do it again. Buried beneath her impenetrable facade, however, Jenny has an invaluable musical talent.
When a 80-year-old piano teacher Traude Krueger discovers the girl's terrible secret, her raging brutality and her dreams, she makes it her mission to retransform Jenny into the musical wunderkind she once was.