Mandy Lane (Amber Heard) is an upstanding young teenager who really blossomed into a beauty last summer, and went from a nobody to one of the most popular girls in school. She is excited when she learns that she has been invited to a blow out party at a deserted ranch. Her excitement turns to heart stopping fear when she discovers that people are rapidly and mysteriously disappearing from the party. When she discovers that some of them have been murdered, she begins to question the actual reason that she was invited to the party in the first place. When she begins to believe that her life is actually in danger, she flees the party and is pursued and hunted by a sinister force.