There is none! Although it was released by Imagine Entertainment in two editions (R and UR), a comparison between them showed that they are absolutely identical. For what it's worth, the artwork of the unrated edition is bloodier.
Four friends are forced to enter an out of town junk-yard and throughout the night it's all hell and bullets as the local sheriff's men and the kids fight the mysterious killer that is stalking them one-by-one.
