Party til you drop...

Morgan Michaels and her friends invite an unpopular girl from their high school to a Halloween party as a joke...but the joke backfires, and the girl ends up murdered.

One year later, they receive an invitation to a mysterious Halloween party. It's all fun and games at first, but Morgan soon discovers there's a psycho in their midst, and he's slaughtering them one by one, using a prop from each of their costumes.

Now the killer is in hot pursuit of the remaining survivors. Can they unmask the maniac before they, too, meet an untimely end?