Overview
Tragic Ceremony ( - lit. Extracted from the Secret Police Archives of a European Capital, ) is a 1972 horror film directed by Riccardo Freda (credited as Robert Hampton) and starring Camille Keaton, Tony Isbert, and Máximo Valverde. Its plot follows a group of young people who find themselves haunted in the hours after witnessing a black mass while lodging at a remote estate during a rainstorm.
The film received a limited theatrical release in Italy on 20 December 1972. In 2004 it was restored and shown as part of the retrospective "Storia Segreta del Cinema Italiano: Italian Kings of the Bs" at the 61st Venice International Film Festival. The film was never dubbed in English and it's distributed worldwide by Variety Distribution.
Plot
After a day of sailing, a group of friends — Jane, Bill, Joe, and Fred — are traveling through the English countryside when their car runs out of gasoline. In the midst of a rainstorm, they come across a large estate owned by Lord and Lady Alexander, who offer to refuel their car and invite them to spend the night.
Later in the evening, Jane hears music emanating from the basement, and goes to find the source. She uncovers a hidden chamber where the Alexanders are performing a black mass with multiple devil worshippers. When they realize she has infiltrated the event, they attempt to use her as a human sacrifice. Bill, Joe, and Sam go to find her, and begin fighting with the cultists. In a tussle, Bill stabs Lady Alexander in the stomach, killing her. The cultists, having lost their sacrifice, go berserk and attack each other with machetes and swords.
From Wikipedia (CC BY-SA 4.0).