A scientist carelessly dumps some toxic waste into a river. The gardener at a nudist camp drinks the water, turns into a monster and attacks all the (female) nudists.
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Shadow of camera and cameraman cast on sunbather during nudist camp montage. See more
The lab where she had to work was filled with thousands and thousands of rats and mice and other animals that were constantly being experimented on. They were always trying to shoot them full of chemicals and hormones, and things like that, things that upset the delicate balance of nature. It was unnatural.