The four films in this set do share similar themes and of course, the same setting, but each of them brings something different to the theme. If you are looking for outright gore or torture porn, don't waste your time; these movies rely on atmosphere, on a build-up of creepiness to a pitch of tencion. They also focus on characterisation, on creating characters you actually care about. They touch on dangerous and challenging topics, such as child cruelty, same-sex relationships, and the vestiges of Japanese colonialism in Korea. Yet they manage to be successful as horror stories. And you get four full length movies for your money, which can't be sneered at. Quality entertainment.