Mabo tells the story of one of Australia's national heroes - Eddie Koiki Mabo, the Torres Strait Islander who left school at age 15, yet spearheaded the High Court challenge that overthrew the fiction of terra nullius.Mabo tells the story of one of Australia's national heroes - Eddie Koiki Mabo, the Torres Strait Islander who left school at age 15, yet spearheaded the High Court challenge that overthrew the fiction of terra nullius.