The Curse of the Black Sisters was released in the year 1973。The Curse of the Black Sisters is also called as Fluch der schwarzen Schwestern, Der, Veil of Lust, Vampire Ecstasy, The Devil's Plaything, Pornografiske jungfrun, Plaything of the Devil, Möte med djävulen, Veil of Blood, Ancora di più。

In this sleasy "erotic horror movie", a young pretty virgin, Helga (Marie Forså) arrives at a castle in Germany. In the castle's basement, naked women, led by a bitch called Wanda, perform rites with penis shaped candles, while bongos are heard on the soundtrack. People staying at the castle engage in softcore bonking sessions.