The Satanic Rites of Dracula

The Satanic Rites of Dracula is a 1973 horror film directed by Alan Gibson and produced by Hammer Film Productions. It is the eighth film in Hammers Dracula series, and the seventh and final one to feature Christopher Lee as Dracula. The film was also the third to unite Peter Cushing as Van Helsing with Lee, following Dracula 1958 and Dracula A.D. 1972 1972.

The cult kidnaps the Secret Service secretary Jane Valerie Van Ost, who is later bitten by Dracula Christopher Lee. Murray, Secret Service agent Torrence William Franklyn and Van Helsings granddaughter Jessica Joanna Lumley arrive at the country house. They separate Murray and Torrence investigate inside the house, where they meet Chin Yang. Jessica enters the house through the cellar, where she finds Jane chained to a wall she is revealed to be a vampire. The ensuing commotion awakens other female vampires who are likewise imprisoned, but they attempt feed on Jessica. The agents hear Jessicas screams and come to her rescue. Murray kills Jane with a stake, and he escapes the grounds with Jessica and Torrence.Van Helsing visits his scientist friend Julian Keeley Freddie Jones, whom he recognized among the four conspirators. The mentally unstable Keeley is involved in bacteriological research designed to create a virulent strain of the bubonic plague. Van Helsing is shot by a guard and passes out. When he revives, Keeleys dead body hangs from the ceiling and the plague bacillus is gone. ........

Source: Wikipedia