A man rents a room a brother & sister so he can have extramarital affairs away from his own house, however his landlords are draining the blood from everyone who enters the room.
An extremely dark and original take on the vampire genre. Set in the modern day (1981 when it was made) unlike many vampire movies of the time, the setting does give it much more credibility than its Gothic counterparts. The draining sequences are very dramatic, no fangs here but a massive machine which pumps out the blood into some very gory scenes. The performances are a lot better than you might think, the 4 leads are surprisingly good as is most of the supporting cast. The second half of the movie is great, tension mounts very well, the pace improves and the last 10-15mins are superb and quite scary at times. The film does have a couple of issues though, in the first half pacing is quite sluggish, as the set up sequences to key scenes take an age and at times fail at keeping the viewers attention, editing is also quite strange at the beginning (although that could just have been the copy I watched 1983 UK VHS).
Overall a very good surprising watch, if you enjoy weird fairly gory horror there should be plenty for you to enjoy here. Interestingly this quite rare horror was put onto the DPP's section 3 list here in the UK (meaning the police could seize it from the shelves), a real shame as this well made little horror didn't deserve the negative attention it got.