The catastrophic collapse in 1966 of a coal-waste tip above the south Wales village of Aberfan remains one of the most devastating tragedies in modern British history. The slide engulfed a school and neighbouring homes, claiming the lives of 116 children and 28 adults in a disaster that shocked the world, but the story of what followed has been largely forgotten. Marking the 60th anniversary, this documentary uncovers the little-told story of the extraordinary campaign that emerged in the disaster's aftermath, revealing how a shattered village rose from unimaginable grief to demand justice, challenged the most powerful institutions in Britain, and forced the removal of the coal tips that still loomed above their homes