In the attic of a creaking New England mansion, two scientists create the resonator, a device capable of bridging the barrier to a parallel dimension. But the denizens of said dimension claim one of the scientist for their own via a gruesome murder. Jeffrey Combs plays the surviving scientist whose mental scars land him in an institution. Barbara Crampton plays a psychiatrist who springs Combs to help her recreate the experiment. Disaster ensues.

EC Comics pulp meets Hellraiser kink. The transgressive practical effects delight, and the cast straddles the fine line between heightened performances and camp. Indeed, the entire film walks a tonal tightrope with success, save when a character produces a cartoonish explosive (complete with timer) to initiate the finale.