British nunsploitation, made as a tribute to the European nun flicks of the 70s (director/writer Nigel Wingrove is actually the founder of UK media company Salvation, which distributes work by directors such as Jess Franco, Jean Rollin, Dario Argento, Mario Bava, Bruno Mattei, and Lucio Fulci).
In the past (we don't know exactly when, but people travel around on horseback) a Mother Superior has become obsessed with lustful thoughts after hearing confessions from some of her young nuns. In her agitated state she imagines having a conversation with Mary Magdalene and (for some reason ) a zombie nun, during which she recounts four of these confessions. As she does so we see them played out.
All the young nuns are played by 'adult entertainment' actresses - not surprising given the scenarios are nude soft-core involving self-flagellation and/or sex between nuns. The acting is atrocious, and the 'story' is nothing but an excuse to show... stuff. However... compared to most skin-flicks (IMDb classifies this simply as 'horror', but let's call it what it is), it clearly has a budget, with a nifty title sequence, good location work (inside and outside), costumes, props, a (relatively) large cast, and a 1 hr 15 min runtime. The camerawork is also pretty good, and the girls are hot (although obvious boob jobs, lipstick, and nail-varnish do look out of place on nuns; no wonder so much stuff was going on!). Oh, for Brits there's a cameo by cult actress and sometime TV presenter Emily Booth. 5/10.