This was a fairly lame cannibal exploitation film. Susan (Ursula Andress) and her obnoxious brother head off to an island of New Guinea to search for her missing husband. Stacy Keach and stock animal footage are employed along the way. The government doesn't allow expeditions in this area. They take a helicopter to a mountain, then walk to a beach (a nice wide one where a helicopter could land) then take a boat to an island. Plot continuity was not part of the plan. The plan was to get Ursala Andress stripped naked, tied up and greased down similar to what Bo Derek would later do in "Tarzan". We now know John Derek's fetish. Bo er ah Ursala doesn't encounter the cannibals until the last 20 minutes of the film.
In the 1970's this was great stuff. By today's standard it is really ho-hum. A few animals may have been killed for this film. There are better Ursala Andress films out there.