Outline of the whole film

A group of friends are out camping in a field. One of the female members staggers off across the field drunk. She realizes she is lost and she begins to try and find her way back towards the tent. However as she begins to do so, she finds herself venturing into a wooded area. She begins to feel she is being followed. She begins to run through the woods. She reaches an old abandoned caravan which has furniture overturned, stuff strewn everywhere, blood all splattered up the walls and then her eyes fix on the body of a young woman who is dead on the floor. She screams and gets a mental image of a hooded figure with a knife, stabbing the woman in the room.
The girl wakes from a nightmare later that night in the tent once the drama is over and she is back with her friends but wakes up with a start.
Once woken from this nightmare, each night in her head she keeps seeing the same scene over and over again, but each time she sees a bit more of the attacker and feels his presence.
THIS IS THE TWIST IN THE STORY!!! - if she is aware of him, then he is aware of her and he senses her and he is beginning to look for her.
Throughout the days going by she continues to think of him. Strange things begin to happen to her like things begin to go missing and things appear that were never there before. She is the attackers next victim.
Everytime he gets close to finding her, she somehow prevents him from finding her.
The story ends on a cliff hanger with them meeting each other and its up to the audience to decide whether she lives or dies.