The renowned Italian director Umberto Lenzi tells a tale of cannibals at play in the Jungles of New Guinea, starring Robert Kerman, Janet Argen and Mel Ferrer. When a young woman's sister disappears, the only clue to her whereabouts is a glimpsed appearance in a bizarre film showing scenes of cannibalism, left behind by a hitman murdered on the streets of New York. The trail soon leads to New Guinea, where the subject of the film, the self styled spiritual leader 'Mr. Jonas', is teaching his cult followers ancient cannibal rites...