When her anthropologist husband fails to return from an expedition into the Manilla jungle, Susan Stevenson (Ursula Andress) organises a search party to go looking for him. Accompanied by her brother Arthur (Antonio Marsina) and her husband's friend Dr Edward Foster (Stacey Keach), Susan heads towards Mount Rarami, the last confirmed location her husband visited. There they learn about the terrible curses which have rendered the mountain taboo and begin to suspect that it might have something to do with the anthropologist's disappearance.