The film follows metal fan and anthropologist Sam Dunn on a whirlwind journey through Asia, South America and the Middle East as he explores the underbelly of the world's emerging extreme music scenes; from Indonesian death metal to Chinese black metal to Iranian thrash metal. Global reveals a worldwide community of metalheads who aren't just absorbing metal from the West - they're transforming it - creating a new form of cultural expression in societies dominated by conflict, corruption and mass-consumerism.

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