Four sets of friends spend Halloween weekend at the Beautiful Creekside "Kamp of Antietam". Each attending is promised a "Once In A Lifetime" experience, but there's more than just fresh air and fishing going on at the K.O.A.
After a prank goes wrong, one person is left dead and another institutionalized. Ten years later, a group of friends are partying at a cabin in the woods unaware that a deranged psychiatric patient has escaped and is hell bent on revenge.
