A disparate and desperate group of plane crash survivors are thrust into a desolate mountainous desert region somewhere within present-day
Namibia. Brian O'Brien is a big game hunter and the best survivalist of the group. Shortly after the plane crashes, stranding its passengers, he risks his life by re-entering the burning wreck and recovering vital supplies, including a hunting rifle; however, O'Brien's motives are far from noble. Thinking his own chances will be improved by the absence of competition, he ruthlessly seeks to eliminate his fellow survivors, one by one, intending to leave only Grace Monckton (Susannah York) alive, an "Eve" for his "Adam." In addition to O'Brien's treachery, the survivors are menaced by a troop of
chacma baboons inhabiting the area. Initially content to holler at the intruders from the distance, the animals gradually become more aggressive as they realize the people are only a physical threat to them when they have weapons. Before O'Brien is able to bring his plan to fruition, one of the fellow survivors he had driven off into the desert at gun point (presumably to die of thirst) returns with a rescue party. The remaining survivors make their escape in a helicopter. O'Brien, aware he will be prosecuted for murder if he returns to civilization, chooses to remain behind. With O'Brien the sole human in their domain, the baboons become more belligerent. At first he is able to keep them at bay with his rifle. When he runs out of ammunition, O'Brien brazenly challenges the alpha male to a fight and succeeds in killing him with his bare hands. In the film's final shot the remaining baboons encircle the lone hunter and ominously amble towards him. ==Cast==