Despite finding success in the US with their first three brilliant albums they faced indifference through prejudice at home, became disillusioned and disbanded in 1975. But their music lived on as new generations of artists, in the UK and the US discovered, sampled and reworked their pioneering sounds, taking their music to new audiences.
Illustrated with archival footage, the story of these unsung heroes is told on screen through new interviews with the original band members filmed over two years.
