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Harvey Denton (Colin Friels) learns that his cameraman father's death may not have been an accident and might be related to some top-secret film footage he shot three decades earlier. An eccentric hermit named Prosper Gaffney (Donald Pleasence) provides further clues and implies there's a connection with British nuclear tests. Denton travels into the Australian desert, where he discovers a government plot involving the exploitation of hundreds of Aboriginal Australians. Wikipedia