Dracula A.D. 1972

Loner Mark Lewis works at a film studio during the day and, at night, takes racy photographs of women. Also he's making a documentary on fear, which involves recording the reactions of victims as he murders them. He befriends Helen, the daughter of the family living in the apartment below his, and he tells her vaguely about the movie he is making.

A British estate agent travels to Transylvania to meet the mysterious Count Dracula, who is interested in leasing a London castle. After Dracula enslaves the agent and drives him to insanity, the pair return to London together, where Dracula, a secret bloodsucker, begins preying on socialites.

After a spate of murders, the villagers of Schtettel kill the depraved perpetrator, Count Mitterhouse. Fifteen years later the Circus of Nights appeared in the plague-ridden village and its performers include Mitterhouse's mistress, children and cousins. They have come to Schtettel to fulfil the Count's last words, an evil, vicious curse of death and destruction on those who participated in his impaling. The children of Schtettel become the targets for a brutal and devastating revenge as the Vampire Circus rehearses for its most deadly performance.

In foggy London Dr Jekyll experiments on newly deceased women determined to discover an elixir for immortal life. Success enables his spectacular transformation into the beautiful but psychotic Sister Hyde who stalks the dark alleys of Whitechapel for young, innocent, female victims, ensuring continuation of the bloodstained research. With each transformation Sister Hyde becomes the more dominant personality, determined to eventually suppress the frail, ineffectual Dr Jekyll forever.