Witchfire (1985)

After her psychiatrist is killed in an auto accident, his mentally deranged patient Lydia and two of her even crazier companions hide out in a house in a rural area where, years ago, Lydia had set fire to her parents. Before long, a hunter comes upon the house and is held captive by the women. Lydia, who believes she's a witch, intends sacrificing their captive in an attempt to bring back their beloved doctor.