Intelligent, thought-provoking and always pushing the boundaries of metal music, Metallica have remained at the top of their game whilst others groups have fallen by the wayside. Nevertheless, the band's dynamic has changed drastically since they first came together in 1982, with them working their way through numerous bassists and even continuing after the tragic death of band member Cliff Burton. Always keeping the fans guessing, Metallica have managed to appeal to the mainstream whilst never compromising their artistic integrity as countless new generations of fans discover their music.On 'Metallica: Dark Souls' we go behind the music to discover what it took for this unlikely group of headbangers to remain Kings of the metal scene for over two decades (and counting). Packed with interviews this documentary film takes you where cameras never previously preyed to achieve an uncensored look at a truly legendary band.