Mud, music, dancing, drugs, and free love form the crux of this holistic history of the U.K.’s greatest open-air music festival, the longest-running in the world. The film incorporates performance recordings, unbridled crowd reaction shots captured by concertgoers, and Temple’s own footage of its 2002-05 editions, cumulatively covering every festival between 1970 and 2005. Encompassing the best (and worst) aspects of the five-day fest, the documentary allows audiences to witness Glasto’s evolution, as well as the sea changes in society at large. With performances from the likes of Björk, David Bowie, James Brown, Nick Cave, and Morrissey.