Fanged femme fatale Mircalla Karnstein (Ingrid Pitt) slakes her bloodlust for mortals of girlish figures in this Hammer horror story that has the 19th-century noblewoman stalking the Austrian countryside, bewitching young daughters at every turn. Appearing first as Marcilla, then as Carmilla, the insatiable siren steals women's hearts and leaves ruin in her wake, but in grieving General von Spielsdorf (Peter Cushing), she may have met her match.