A New York University professor returns from a rescue mission to the Amazon rainforest with the footage shot by a lost team of documentarians who were making a film about the area's local cannibal tribes.

Professor Harold Monroe: I wonder who the real cannibals are.
[first lines]
Reporter: Man is omnipotent; nothing is impossible for him. What seemed like unthinkable undertakings yesterday are history today. The conquest of the moon for example: who talks about it anymore? Today we are already on the threshold of conquering our galaxy, and in a not too distant tomorrow, we'll be considering the conquest of the universe, and yet man seems to ignore the fact that on this very planet there are still people living in the stone age and practicing cannibalism.
Female TV Executive: Today people want sensationalism; the more you rape their senses the happier they are.
Professor Harold Monroe: Ah, yes, that's typical western thought. Civilised isn't it? That's what Alan thought and that's why he's dead. The Yacumo Indian is a primitive and he has to be respected as such. You know, did you ever think of the Yacumo point of view? That we might be the savages?
[the group come across the impaled girl. Close-up of Alan smiling at the scene while Faye glares at him]
Mark Tomasso: [off camera] Watch it, Alan, I'm shooting.
Alan Yates: [feigns shock] Oh, good Lord! It's unbelievable. It's... it's horrible. I can't understand the reason for such cruelty. It must have something to do with some obscure sexual rite or with the almost profound respect these primitives have for virginity.
Professor Harold Monroe: Would you like people to make money off your misery?
Chaco Losojos: You did it goddamnit! They've just invited us to dinner!
Professor Harold Monroe: They what?
Chaco Losojos: In there, the more you carry, the quicker you get tired, the sooner you die.
Alan Yates: [Faye, Alan's fiance, is being carried away by the Yanomanos] Faye! Faye!
Mark Tomasso: [Simultaneously screaming at each other] Did you see it, Alan? She's had it! We gotta think of ourselves!
Alan Yates: No! We gotta get her outta there! I want to save her!
Mark Tomasso: We gotta get the film back home, Alan!
Alan Yates: I wanna save her!
Mark Tomasso: Think of the film, Alan, think of the film!
Alan Yates: I don't give a shit about it!
[cuts away]
Chaco Losojos: [while examining a corpse] Hey, professor! I recognize these teeth. This is Felipe Ocanya. He knew the jungle as well as I do.
Professor Harold Monroe: That makes me feel terrific.
Alan Yates: [while filming a burning hut full of terrified natives] It's beautiful!
Faye Daniels: [while Jack is filming a rape] Jack, what do you want to use this for, a porno film? Stupid men!
Alan Yates: That's not a bad idea! How about "Jungle Jollies"?
Alan Yates: We really screwed ourselves this time, trying to, trying to stay there for the last shot. I don't even know where we are now, but I know, they... I know they, uh, followed us, and, and we lost everything trying to escape. We're screwed! We're trapped!
Chaco Losojos: They just want to show us they are brave warriors. And they want us to follow them to the village.
Professor Harold Monroe: Follow them?
Chaco Losojos: Yeah, to return the prisoner, and to talk.
Professor Harold Monroe: Hey listen, I-I don't know about this. I think they want us for dinner tonight.
Professor Harold Monroe: Yes, yes, that is precisely what I want. I've seen the rest of the material, you haven't. You haven't seen the stuff that even your editors didn't have the stomach to put together, and if you had, you wouldn't hesitate but to agree with me.
Professor Harold Monroe: [voice over] We weren't able to get anything out of the Yanomamo except for the wristwatch they gave us as a token of their gratitude to an ally, an ally they continue to fear and mistrust, so I've decided to try an experiment in psychology: to strip myself completely, clothes, weapons, dog tags, rings, everything, to become like them, naked and unfettered as Adam.
Professor Harold Monroe: All I want to know, Mr. Chaco, is... do we have a chance of finding them alive?
Chaco Losojos: Who's to say? The only thing I know is we're gonna risk our lives to save those fuckers. Let's go see the Yacumo.
Alan Yates: Here we are at the edge of the world of human history. Things like this happen all the time in the jungle; it's survival of the fittest! In the jungle, it's the daily violence of the strong overcoming the weak! Jack!