When a transgender teen goes missing, Annie Ryder—a cop at odds with her hometown—dives in to unravel the disappearance that suggests foul play, despite finding herself in a difficult position as she must cast suspicion on people she has known all her life.

Kylie Winters, a bullied and self-loathing teen, reluctantly agrees to babysit at an isolated country mansion on Halloween night. When a small boy in a pig mask appears at the door trick-or-treating, Kylie’s night transforms into a horrifying and violent cat-and-mouse game. She must go beyond what she ever thought possible if she and the children are to survive the night.