A group of friends head out for a weekend of fun at an abandoned cabin in the woods but unwittingly unleash an ancient evil that begins hunting them one-by-one.
So originality is not a key factor with 'Wither' but then it isn't supposed to be. What 'Wither' is though is an okay little cabin-in-the-woods story that evokes the gritty and primal feel of old school horror flicks of the 70s and 80s - the good and the bad.
The good: (1) There is minimal back story before we get to the "goods"; (2) The cast do an adequate job of looking pretty one minute then terrified the next; (3) There are some pretty neat practical effects throughout; (4) From the setting to the use of film grain, the entire film looks very gritty which helps set the atmosphere; (5) The horror set pieces are entertaining for the most part (and gore fans are well catered to).
The bad: (1) Things happen a bit too conveniently in order to push the film along and there are some breaks in the film's logic that were a bit jarring; (2) Although it's to be expected, there are A LOT of "Why would anyone do that?" moments which are really infuriating; (3) The neat practical effects are counterbalanced by some not-so-neat CG effects; (4) The film starts to drag towards the end and peters out into a bit of a ho-hum conclusion.
'Wither' is no classic but is enjoyable enough if you don't expect too much from it (and we all need films like these once in a while, right?). This is a simple cabin-in-the-woods story: no muss, no fuss. Worth a view.