Kylie Winters, a bullied and self-loathing teen, reluctantly agrees to babysit two children at an isolated country mansion on Halloween night. When a mute boy in a pig mask appears at the door trick-or-treating, Kylie's night transforms from the mundane into a horrifying and violent cat-and-mouse game, hunted by three deranged butchers through the maze-like estate. Forced to confront her own cowardice, Kylie must go beyond what she ever thought possible if she and the children are to survive until help arrives...