A household is attacked by a gang of psychopaths sporting animal masks throughout a anniversaries. Insulate the home, they have to combat with every thing they’ve available to deal with this assault and to outlive. The assaults embrace machetes, axes and bows. However masked not think about one factor: Erin beloved eldest sons, is a woman with a mysterious previous and a bit of arduous to kill. Erin proves to be extra gifted than criminals.