I'll try!
Premise:
An overworked husband, in desperate need of some time off for himself, goes on a solo hunting trip with his faithful dog for a week at an isolated hunting cabin his family owns. He arrives late and goes to bed, eagerly excited to wake up at 3AM to start his hunt...but earlier in the night... he awakes to his dog barking frantically and something scratching at his door. He grabs his gun, rushes downstairs and flings open his door to find is he the hunter or the hunted... (Heh, lame. but premises ARE LAME.)
Short Synopsis (sorry about the length):
An overworked, successful businessman in desperate need of some time off for himself, takes his first by-himself vacation in 7 years to his family's retreat and hunting cabin. Tagging along is his faithful hunting partner, a short-hair Irish Setter. As he drives deeper into the depths of the thickening forest, he checks his phone's voicemail one last time. 4 messages, We hear his boss bemoan his week off, his wife wishing him love, his drunk best friend grumble about something or another --delete--, and his grandma who pouts or rather forewarns:
We learn from Grandma that her son/his father died there under mysterious circumstances when our protagonist was a kid. He too went hunting off by himself at this very same location. She goes on asking him to cancel the trip, almost begs him to not go, I mean she read his horoscope, it said he should try to avoid being alone if possible for Christ's Sake! Obviously a bad omen! But you know how over-protective grandmas are, he re-assures her that's he's not alone, he has his dog and he'll make sure he doesn't everything he can to stay safe. He's just going deer hunting, what's the worst that could happen? But before they could say bye the phone suddenly dies, he's out of range.
He arrives late and unpacks, we learn his phone has no signal. He goes to bed plugging in his clock in the process. Middle of the night. We hear the dog barking, snarling but this isn't some normal bark. He yells at the dog to shut up but he doesn't, he only gets more aggressive. He buries his head in the pillow and then SCCREEEAAATTTTCH-- A DEAFENING SCRATCH pierces the house, the door. What the F*ck was that? Seconds later, the alarm clock blares off, 12:00, shit, it figure he forgot to program the damn thing. He stumbles out of bed, grabbing his gun as he rushes to the door. The door has 5 holes in it, five long holes left by a scratch. Shit, it pierced through the whole door? He takes in a breath and flings open the door, pointing his gun in every direction looking for this animal. Nothing. He decides to investigate. He goes inside and grabs a florescent lantern, his dog tries to scramble out the door as he opens it, but he keeps his dog inside...for now. Outside:
He examines his door. The scratches are huge, he can almost fit his hand through one scratch alone! He then looks at the brass doorknob, it's crumbled, like something was chewing on it, trying to open it. Also nearby, he notices his windows. One of the two windows besides thed oor are fogged over by an almost perfect circle. Inside the foggy botch is the an "m" or rather a big "M". It almost looks like some kind of snout? Hmm, upon closer inspection, there's something else on the window, something thick, what is that, Mucus? Suddenly BUSHES RATTLE at the edge of the treeline, he snatches his gun and dashes over but he's much too slow for it. We hear bushes rattle, branches break at an increasing further distant. He gives up any chase and examines the area. He finds a paw print the size of a dinosaur but it looks like a big cat or dog. But the oddest thing he found there was caught on a thorny bush, some hair, some long black almost a foot long fur. What left this?
Next day, he goes hunting, runs into a 3 does, all dead. Never seen anything killed like that before. Later that night he his a journal his dad left under a closet and learns of the beast, about how his dad went to kill it. He decides he wants nothing to do with it... that is... till his dog starts barking and this time runs off somehow. He decides he needs to chase down the beast and kill it before it kills his dog....and him kind of thing. (In the end, he never comes home and a search finds his dog and his remains....in a similar matter as the 3 dead doe.
The thing that make this "scary" movie different is that every time he goes hunting after the "beast", it would switch to "1st person" POV. We would see what he sees as he hunts and ONLY what he sees. I think that would add so much suspense and make the movie 100 times scarier. It's limits what the viewer sees and their knowledge of their surrounding. Also, this is a movie with only 1 PERSON in it, very FEW locations, and easily made on a small budget, no? Hell, you never have to show the monster if you don't want to and it has that "fear of the unknown" factor as mentioned earlier 
