In the series exploring landmark 20th-century orchestral works, composer Michael Berkeley investigates the fascinating story behind the violin concerto that Alban Berg dedicated "to the memory of an angel" - a stunningly beautiful young girl who died at the age of 18. Shot in Vienna and Carinthia, the film uncovers the coded messages buried deep within the music, including hidden melodies, secret numbers and even an anti-Nazi agenda, while the piece is rehearsed and performed by soloist Leonidas Kavakos with conductor Andrew Davis and the BBC Symphony Orchestra,