A group of teenagers is stalked and murdere by an unknown assailant one by one while attempting to re-open an abandoned campground where a young boy drowned in a lake nearby.
A tame, poorly plotted serving of schlock, less horrific for its ketchup-smeared murders than for the bare-faced fashion in which it tries and fails to rip off Carpenter's Halloween in matters of style and construction.
a campfire boogeyman story designed to do little more than build tension and deliver a few well-timed shocks, which it does with precision and even a bit of artistry
What makes the movie work is that the slasher genre hadn't been set in stone yet, and some choices that director Sean S. Cunningham makes in the film that work against type.
It depicts what is surely the first recorded instance of the game "Strip Monopoly" and would later inspire Wet Hot American Summer, and we should all be grateful for that.