Sir Hubert Parry is simultaneously one of Britain's best-known and least-known composers. Jerusalem is almost a national song, regularly performed at rugby grounds, schools, Women's Institute meetings and the Last Night of the Proms, while Dear Lord and Father of Mankind is one of Britain's best-loved hymns. Everyone knows the tunes, yet hardly anyone knows much about the man who wrote them. In this film, HRH The Prince of Wales, a longstanding enthusiast of Parry's work, sets out to discover more about the complex character behind it, with the help of members of Parry's family, scholars and performers. This feature-length documentary by the award-winning director John Bridcut offers fresh insight into the life and work of Hubert Parry through the unique perspective of HRH The Prince of Wales.