Here's the synopsis:
Seven years after the free and easy days of high school, four friends meet up at the "Wide Open" - a wild, after dark, golf tournament. The foursome made up of Ben, Fast, Nick and Jack - now men with separate lives and separate perspectives - reunites in the thick woods of Virginia at Woody Hole Golf Club, which just so happens to reopen just in time to host their annual golf outing. But when a stranger stumbles onto the remote course and into their lives, chaos explodes. Soon, these friends are plunged into a horrifying struggle with hideous creatures determined to destroy them. ...You do not want to make the Groundskeeper angry. Trust me.
Just as things look their darkest, a mysterious stranger enters the fight. THE GROUNDSKEEPER, once a promising professional golfer, is now a misunderstood loner. The unexplained disappearance of his son has left him heartbroken and alone. A man with nothing to lose, he fortifies the group. As the reality of the situation and his child's horrifying fate become all too apparent, he rises to the challenge and acts out his own rage-induced revenge.