A series of brutal rapes, usually resulting in death, are plaguing a small Wisconsin town (though filmed in Canada, I couldn't tell the difference to be honest). An unusually large amount of semen is found in each attack but tests reveal it to be from just one perpetrator. It's down to the local cop, news reporter and doctor to solve this horrifying mystery. Although this is a supernatural horror movie the attacks are played out in slasher fashion, there are a couple of male victims too. I watched this on a dark, grainy VHS tape, very nostalgic but poor quality, which didn't exactly help my viewing pleasure. To its credit some of the horror scenes are quite effective, helped by a good musical score, and the cast is satisfactory but the microphone makes a couple of appearances, destroying said scenes. Based on a novel by Ray Russell, I have not read this myself but the film completely neglects to show the huge phallus of the Incubus (potential censorship issues perhaps?). I don't like to give away spoilers, all I will say that the twist ending was disappointing, as was the brief shots of the demon itself. However, what I thought really cool was the inclusion of a music video by British heavy metal band Samson featuring a very young looking Bruce Dickinson on vocals before he joined Iron Maiden! If I watch a film on VHS and like it I will usually seek out a disc release but on this occasion I probably won't bother. OK for a late night horror flick though and still better than most modern genre releases.