During Christmas vacation at the rural Calvin Finishing School For Girls, a student is killed when she is accidentally pushed over a balcony during a prank. Two years later, on the Friday before Christmas, the school is emptying out for the holiday; however, five students - Nancy, Melody, Leia, Trisha, and Sam - decide for various reasons to remain at the school, planning to have a weekend get-together with their respective boyfriends. That night, while the remaining girls have dinner, their classmate Cynthia and her boyfriend are murdered outside the school by an assailant with a hunting knife.