A young woman moves to a cabin in the middle of nowhere as she believes it'll help the long-term recovery of her brother who was left quadra-spazzed on a life-glug* in a car accident some months before.
Sure enough, before they've unpacked their slippers and DVD box sets, the brother shows great signs of improvement by getting up, walking around and murdering someone. Unfortunately his recovery is mostly down to some unpleasant demonic spirits using his body as a carriage to get up to all sorts of mischief. Those pesky ancient entities!
Like many, many other films it pretty much becomes a cover version of Evil Dead, but unlike many others it does enough right to be enjoyable in its own right.
That is enough for you to decide if you wanna watch it or not.
*Ta, Chris Morris. I wish he'd do loads more stuff. He made TV in the '90s worth watching.