A HALLOWEEN TREAT !  A group of naturists open Sunny Buttocks nudist camp near a small town, but local religious fanatics pressure the authorities to close the camp down. The nudists are so ashamed and outraged by this act that they commit mass suicide -- but not before vowing revenge on the zealots who had their camp closed. Five years later they return as zombies to the site -- now a church summer camp -- and start killing off the campers.