I used to see this box in the video store and thought it looked like one of those no-budget, camcorder horror movies that are unwatchable. The box was just that shitty looking. But it turns out my impression was wrong, this is a lost minor classic from the 70's that I will highly recommend to anyone who likes these kinds of movies.
It's basically a spin on House of Wax's story, with some weirdo who lives in the middle of nowhere and abducts people, kills them and makes them into mannequins. Also he likes to dress up as mannequin versions of his victims and treat his mannequins like they are real people (some of them seem to be alive) and at one point keeps shouting "little girl!" while chasing one of his victims around.
I don't care what any Andrew McCarthy movies lead you to believe in the 80's; mannequins are fucking creepy as shit and are not to be trusted. There are a lot of scary as fuck mannequins in this movie, and other creepy shit like people being smothered to death by wet plaster, and at least one weird twist that has to be seen to believe. But there's also some really strange dark humor that pops up now and again, usually involving the killer talking to his mannequins.
It's a bit in the Texas Chainsaw Massacre vein of oddball low budget horror movies from the 70's, and it's just so weird and creepy that I think it's a must-see for fans of this stuff.