Plot synopsis: Simon Russell Beale takes a journey through Italy, Britain, Germany and Austria as he explores how the sound of Christmas has evolved in response to changing ideas about the Nativity. His story takes us through two millennia of music, from a fragment of papyrus preserving the earliest known piece of Christian music to the stories behind Hark the Herald Angels Sing, Silent Night and In the Bleak Midwinter, and the work of popular Christmas composer, John Rutter. Music is performed by Harry Christophers and his choir, The Sixteen.