After opening scenes showing volcanoes of Java, an underground river, waterfalls, cloud effects, a coral island, the Ghost Rocks of Buru, and a tiger hunt in Siam, documentary footage of the cannibal tribes of New Guinea is framed by a fictional narrative in which the scientific expedition is shipwrecked along the southern New Guinea coast in the land of the Kia Kia headhunters, thus affording the crew the opportunity to film the tribal customs of these cannibals.