When a single mother goes on vacation for a week, she has to leave the little son and a daughter with her parents with whom she didn't communicate for many years, and children didn't see them at all. All of it happened because of the horrible memories, seriously injured a woman strange night many years ago. The children come to the secluded farm in Pennsylvania, inspired by the long-awaited acquaintance with family where everything seems nice and friendly, especially grandparents at the first minutes of the visit. There are a few rules in the house: have a good rest; eat as much as you want; and most importantly: never, under any circumstances, do not leave the room after half past nine in the evening. No wonder that children's curiosity was hooked at once for the last rule and grandchildren soon broke it. Full of joyful emotions visit turns into horror when the kids notice the frightening characteristics of their grandparents. The mother can not pick them up, and there is not a single living soul all around. Boy and girl find themselves face to face with an ancient evil and only from them depends the further course of events.