A woman (Ursula Andress) takes her brother with her to New Guinea to search for a missing expedition led by her anthropologist husband. Along the way, she makes a shocking discovery: many of the natives are brutal savages, and she stumbles on a murderous cult that feeds on human flesh. With its graphic gore and bloodletting–as well as scenes of real animal sacrifice–this film is another example of the Italian cannibal genre of the 1970s.