An orphaned Indigenous girl is forced to live with her reluctant, street-smart, francophone auntie and her two best friends in 80's Montreal.

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.