The Killer Reserved Nine Seats (1974)

On his birthday evening, Patrick Davenant, a very rich Englishman of ancient nobility invites some friends to visit the old theater located in the family palace, which has been closed for 100 years, since an entire family had perished there. The protagonists of the tragic night are: Patrick's sister Rebecca and her close friend Doris; Patrick's daughter Lynn and her boyfriend Duncan; Patrick's first wife Viviana with her current husband Dr. Dalbert; and starlet Kim with her lover Russel. As the party starts, a mysterious character accompanied by a guru shows up and all the doors immediately close once the new duo are inside. Then begins a chain of crimes and horrors, all committed by Patrick almost ritually, according to a centuries-old curse.