Seven graduating sorority sisters decide to throw a graduation party at their sorority house despite the objections of the resident house mother. Following an embarrassing altercation between the house mother and one of the girls, a foolish prank is played that results in the old woman's death. Unable to cope with the accidental death, the girls decide to temporarily hide the body and not inform the police until after the party. On the night of the party, each girl is individually stalked and murdered in a grizzly fashion by an unknown assailant. There is only one girl left alive to tell the tale and the one person who can reveal the truth may be the one who wants her dead.