On a prom-night dare, a trio of high-school friends chant an incantation, unleashing an evil spirit from the past with deadly consequences. That same night, the girls are abducted by a gang of high-school jocks. Once rescued, their tormentors receive their just desserts, dying one by one in a chain reaction of gruesome murders, each with a bizarre "Urban Legend" twist. Is it all just a high-school prank taken to grisly extremes - or has "Bloody Mary" returned from the grave to wreak her own vengeance?