Metal music is an underground music genre. Not everyone really knows about it. This documentary is definitely one of the great music-related documentary. It takes us through the journey of the musicians and the highlights of their career. The way the film is directed is like a full-length dramatic film. It shows friendship, success, sacrifices, emotional turns and struggle. It does makes the viewer emotional but its its own musical way. The background music is theme related and carries the mood of the documentary till the end. With zero knowledge about Metal music, I still enjoyed the film till the end. A great delight to watch.

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