The secrets of a small New England town are violently exposed on Christmas Eve in this proto-slasher shocker. The owner of the long-abandoned Butler estate is desperate to sell, and dispatches his lawyer from New York to negotiate its purchase by the town council. Meanwhile, an inmate from a nearby insane asylum breaks loose and makes his way to the old mansion to take bloody revenge for a crime kept hidden for 35 years. The maniac makes mysterious phone calls to various prominent citizens, telling them that "Marianne" has returned, and lures each to the Butler house to meet their doom. The mayor's daughter, Diane, receives a visit from a man who claims to be Jeremy Butler, the mansion's owner, in town to investigate his lawyer's disappearance. Together they attempt to unravel the sinister mystery of the Butler house, which turns out to be a harrowing tale of incest, insanity and mass murder. Cult favorites Mary Woronov and John Carradine are featured in the cast of this eerie thriller, which also includes cameos from Warhol Factory legends Candy Darling and Ondine.