The Gist: A couple on their honeymoon are the targets of a vampire cult.
Clarification: Your run of the mill Hammer horror film meaning it is very high quality even if the story is pretty cookie cutter for a Hammer Film. Husband and wife go on vacation, end up in spooky place, head of spooky place wants woman and wants to get rid of guy. Pretty much Dracula without Dracula. This is no coincidence because this film was originally scripted to be a Dracula film but no Christopher Lee meant no Dracula.
Selling Point/Female Vampire Factor: There is only one real vampire in the film who tends to do the dirty work for the entire cult and that would be Tania played by Isobel Black.
which we see earlier in the film that her father did during her funeral suspecting her for being a vampire). Once dear old dad comes back for revenge she goes from innocent girl to deadly vamp as soon as she realizes she's in danger.