Ruby (1977)

“Christened in blood. Raised in sin. She's sweet sixteen, let the party begin!”

Ruby Claire, single mother of deaf-mute teenager Leslie, operates a drive-in theater, where she employs a number of ex-cons, some of whom begin to die in bizarre ways. Eventually, Ruby discovers that the spirit of her dead mobster husband has possessed Leslie, seeking revenge through the tormented girl. As Leslie picks off her father's former associates, she also begins to target Ruby herself.