I've never been a serious fan of the Wrong Turn films, but have found them sufficiently entertaining thus far. I'd actually quite enjoyed part 3, so was eagerly looking forward to part 4. Sadly though, I was left feeling distinctly under whelmed.
Set sometime prior to the events of the other films, a group of teenagers are out enjoying the winter weather on snowmobiles, when they get caught in a blizzard and soon find themselves lost. With night setting in and the temperature dropping, one of them spots a large disused building in the distance. So with little choice, the group decide to take shelter there.
The building turns out to be the former Glennsville asylum, which has been closed since the mid 70s. Following a mass break out, in which the patients, lead by a group of mutant hillbilly retards, got loose and massacred most of the staff. But it seems the old building is not so empty and abandoned as they first thought.
As the group settles down in one of the empty wards, they find their friends going missing with alarming regularity. Yes, our favourite inbred mutant cannibals have taken up residence there and have our intrepid snowmobiling teens lined up as their next meal. Unless the group can find a way of fighting back and turning the tables.
Attempting to fill in some of the backstory of how the 3 mutants from the first film got started, this is really nothing more than a slight variation on the old "teens in peril" story which could easily have been any generic horror film. There's the usual slew of gory killings, which have lost most of their impact now, as you know what you're in for. Plus there were these scenes with a lesbian couple, who seemed to have been put there for no other reason than to put on a constant T&A show, which got kinda stale after a while.
Overall it was watchable, but is easily the weakest in the series so far, and one for die-hard fans only.