Marian Diamond

Unnaturally close twin siblings Jacki and Julian become enmeshed in the swinging London scene, where they attract the attention of the heavily endebted gambler Clive. Seeing a way out of his debts, Clive sets Julian up for a blackmail scheme, setting in motion a nightmarish sequence of events. (imdb)

Set in South London, this surreal and atmospheric low-budget film takes an interesting approach to the vampire genre by focusing almost exclusively on the emotions of its tormented central character: reclusive, intellectual vampire Alex (Julian Sands). (allrovi.com)