Plot

Mick Devlin, an old "flame" of Nancy Drew's, asks for her support with Nellie Mabo, an Aboriginal local, who is desperate to locate a revered idol, a tjuringa board, and return it back to her clan. The Hardy boys join her in Australia

Australia

Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...

, only to encounter a pair of proprietors keeping an opal mine, a blood-hungry poacher on the verge of creating a new endangered species

Endangered species

An endangered species is a population of organisms which is at risk of becoming extinct because it is either few in numbers, or threatened by changing environmental or predation parameters...

, a rage fueled clan war over the land, the Australian outback, and a list of suspects.