Grotesque

Grotesque is a 1988 American horror film by Joe Tornatore, and starring Linda Blair, Tab Hunter, and Donna Wilkes. Blair also served as associate producer. It follows a deformed son, the titular "Grotesque" who avenges the brutal murder of his family members by a gang of punks, which took place at the family's vacation home. It was filmed at Big Bear Lake, California.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.

Poster © the film's rights holders.