In a film three years in the making, producer/director of the acclaimed David Bowie Five Years trilogy Francis Whately creates a kaleidoscopic portrait of Glastonbury for this social and musical history of (probably) The World's Greatest Music Festival, as told through the testimony of its principal curators, Michael and Emily Eavis, and the artists who've appeared there over the years. This is not a chronological plod through the festival's evolution, so much as a thematic and story-driven exploration of the peaks and troughs, the agonies and the ecstasies, that have shaped its many eras. Balancing the driving forces of social conscience and hedonism, Glastonbury has always been both a world apart and a barometer of the state of the nation. Cameras take viewers backstage and deep into the archive to reveal the forces that have driven this alternative nation between utopia and dystopia, the Greatest Night Of Your Life and a Muddy Field In The Middle Of Nowhere.