Movie: Sorority Row (2009)

After finding out a guy cheated on their sister, sorority house Theta Pi play a simple prank on him. They trick him into thinking that he has killed his girlfriend, then take him into the middle of nowhere to ‘dismember” the body, only then revealing it was a prank. However, the prank goes horribly wrong and all involved swear never to speak of it again. A year later at graduation though, they are all reminded of the past..