Married couple Paul and Jennifer (Lukas Hassle and Natasha Henstridge) move into their dream home blissfully unaware that there is an incubus (a horny devil in more ways than one) trapped in the basement. When Paul accidentally frees the demon, he becomes possessed by the evil creature, which proceeds to seduce and kill those who cross its path.
The Black Room begins two years earlier with Miss Black (Lin Shaye) woken in the night by the incubus, the monster somehow escaping its prison in the form of smoke (logic is not this film's strong point). While Miss Black screams at the monster, the invisible incubus enters the room where sexy granddaughter Dawn (Alex Rinehart) is sleeping, peels the duvet off her bed, removes her nightie, fondles her nipples, whips off her panties and gives her an orgasm. It's that kind of film.
Dawn is then lured into the basement, where she is groped by slimy demonic hands before being roasted by a fiery blast from the furnace. So far, so tawdry and trashy.
And so it continues, as Paul and Jennifer take ownership of the property, both keen to have sex as soon as possible in their new home, but unable to find the right time. The demon finds a way to keep them both happy, however, using its powers to satisfy Jennifer in the bath and give Paul head while he relaxes in bed.
The horror begins after Paul unwittingly releases the incubus, and becomes possessed, with several people meeting sticky fates: electrician Oscar is dragged into the 'black room', leaving behind his severed fingers; Jennifer's goth sister Karen (Augie Duke) has her mouth torn open by the rapey incubus's schlong; plumber Leo has his head crushed in a washing machine door by the undead Karen; and housewarming guests Howard (Caleb Scott) and Stacy (Dominique Swain) wind up in the basement as demon food.
Eventually, Jennifer realises the truth and attempts to rid her husband of the incubus (using a metal disc with a glowing 'eye') before the creature can be reborn, none of which makes much sense. Despite a reasonable cast (Henstridge, Swain, and Shaye are deserving of much better), the film amounts to little more than some cheap titillation, a touch of not-very-impressive gore, and lots of really bad visual effects.
3.5/10, rounded up to 4 for Henstridge making her washing machine blow up. Way to go!