A plane crashes in the jungle. One of the survivors gets lost and while trying to find a way out of the jungle he gets captured by cannibals. He is humiliated, stripped naked, and thrown in a hole with a bird for a while. Eventually, he escapes with the help of a cannibal girl and tries to find his plane so he can go home.

A team of scientists working to raise a sunken Russian nuclear submarine on an ocean platform off the coast of Miami, Florida, unearth an ancient Atlantean relic from the sea floor and bring in an expert to make some sense of it. But while attempting to raise the sub, radioactive leakage from its missles triggers the re-emergence of Atlantis, and the resulting tidal wave destroys the platform and leaves only a small group of survivors. Rescued by two Vietnamvets-turned-heavies who are out relaxing after their latest job, their boat eventually runs aground on a Carribean island nearby where, upon going ashore, it is discovered that everything has been destroyed and everybody killed. The culprits, a vicious group of well-armed raiders, and their leader, Crystal Skull, are descendants of Atlantis' original race who set about reclaiming the world and adding the survivors to the list of...

A New York anthropologist named Professor Harold Monroe travels to the wild, inhospitable jungles of South America to find out what happened to a documentary film crew that disappeared two months before while filming a documentary about primitive cannibal tribes deep in the rain forest. With the help of two local guides, Professor Monroe encounters two tribes, the Yacumo and the Yanomamo. While under the hospitality of the latter tribe, he finds the remains of the crew and several reels of their undeveloped film. Upon returning to New York City, Professor Monroe views the film in detail, featuring the director Alan Yates, his girlfriend Faye Daniels, and cameramen Jack Anders and Mark Tomaso. After a few days of traveling, the film details how the crew staged all the footage for their documentary by terrorizing and torturing the natives. Despite Monroe's objections, the television studio Pan American still wishes to air the footage as a legitimate documentary...