Trick 'r Treat (2009)

Halloween horror from director Michael Dogherty which combines four separate tales regarding a secret serial killing high-school principal, a college girl virgin, a woman who hates Halloween as much as her husband loves it and a group of school kids who carry out a wickedly sadistic prank. As the night unfolds, danger descends as unspeakable things roam free and the townsfolk must do all they can in order to survive.