Alan Yentob presents a documentary tracing the musical heritage of New Orleans - a city that lives and breathes music - and asks what effect Hurricane Katrina will have. He meets musicians like Aaron Neville, Irma Thomas and Clarence 'Frogman' Henry, who have lived and worked there all their lives, and are determined to return despite the devastation. With contributions form Paul McCartney, Dr John, Jools Holland and Elvis Costello.