Six sorority sisters (Cassidy, Ellie, Jessica, Claire, Chugs, and Megan) live perfect, fun-filled college lives. When Megan discovers her boyfriend, Garrett, is cheating on her, the sisters plot to stage Megan's death during a makeout session with Garrett as payback for being unfaithful. During the prank, the girls and Garrett bring Megan's "dead" body to a steel mill. While the girls giggle and try to prolong the prank, they mention to Garrett that they need something to chop up the body with. When the girls' backs are turned, Garrett impales a car Lug wrench into her chest, actually killing her. The girls and Garrett, shocked at the murder of their best friend, vow to never ever speak of that night again. One year later, during the party after graduation, the girls get a mysterious video sent to their phones(including the bloody lug wrench Garret used to kill Megan). They find out a hooded "killer" is stalking them and their boyfriends. One by one the girls get killed off and the race is on for them to find out who is behind the brutal murders, before it's too late.Cast

• Briana Evigan as Cassidy
• Leah Pipes as Jessica
• Rumer Willis as Ellie
• Jamie Chung as Claire
• Margo Harshman as Chugs
• Audrina Patridge as Megan
• Julian Morris as Andy
• Carrie Fisher as Mrs. Crenshaw