Roberto Petrocchi directs this period drama set in the late 1800s. Capt. Eugenio (Arnaud Arbessier) arrives in a remote castle to take charge of a unit guarding a nameless prisoner. No one knows much about the inmate as he is held in a forlorn tower. When the captain's wife Adele (Margherita Buy) tries to shake her melancholia by playing the piano, she finds -- much to her surprise -- that she's being accompanied by violin music coming from the prison cell. Soon something in Adele changes abruptly and irreversibly.