The Torture Chamber of Dr. Sadism (1967)

Set in a bygone era, Count Regula faces a gruesome execution for the murder of twelve innocent maidens in his sinister dungeon. Three and a half decades later, he returns from the grave, hell-bent on vengeance against the daughter of his would-be thirteenth victim and the son of his accuser. Driven by a desire for eternal life, Regula's chilling quest for revenge unfolds, intertwining the fates of the living with the malevolent past he cannot escape.