After a seemingly innocent prank goes horribly wrong, a group of sorority sisters are stalked and murdered one by one in their sorority house while throwing a party to celebrate their graduation. A group of girls staying at a sorority house clash with the house's owner, who wants them out. They decide to play a prank on her, but it goes awry and she winds up dead. Panicking, the girls try to hide the body, but someone (or something) witnessed the crime and begins to stalk them.