Walkabout (1971)

Two young white children (Jenny Agutter and Roeg's son Lucien) stumble upon an adolescent Aborigine (David Gulpilil), who is performing a "walkabout." In this ritualistic six-month journey, the boy must learn to survive by himself in the imposing desert. Communication is a problem, although more for the girl than for her little brother, who still has a child's ability to communicate simply and directly. The two teenagers fail to connect for a variety of reasons, mostly due to the girl's lack of interest in a culture that is unfamiliar and different from her own. Ultimately, the differences become too much to bear, resulting in a tragic conclusion that adds an even more somber denouement to Roeg's already grim vision.