Part of the excellent group of horror movies directed by Walker in the 70s, with a mix of exploitation attitudes and B-movie sensibilities, but also with a recognisable personality. It has again one of its best qualities in the presence of the memorable Sheila Keith, that dominates the movie, and it's a sad and gloomy film. It's good to see Walker's filmography being rediscovered in later years, because he is one of the most unique authors of English genre cinema.