An aristocratic demon hunting for fresh human blood, who strikes unsuspecting mortals at night – everyone knows the grim story of Count Dracula. A legend from medieval Romania or interpreted by a writer of horror stories? Now scientists can reveal the truth: The vampire story as we know isn’t modelled on a medieval count from Transylvania but on the fate of a Bohemian princess from the early 18th century. Behind the walls of the dark and giant castle of Czech Krumlov lived a beautiful princess. She suffered from an allergy to light and could only leave her living quarters secretly at night. As a terrible fear of vampires swept central Europe at that time the people of the small village went into hysterics and committed a horrible crime. 250 years later a team of archeologists finds a skeleton of a woman buried in Czech Krumlov according to vampire rituals at: the head of the skeleton had been separated and laid between the bones of the legs, the thorax run through with a wooden implement. This documentary traces the origins of all the vampire myths by uncovering a gruesome murder.