The Dunwich Horror [1970]

In the Arkam University, Dr. Henry Armitage has the infamous Necronomicon exposed in a glass box in the library. Dr. Armitage's assistants Nancy Wagner and Elizabeth Hamilton are closing the library, when Wilbur Whateley arrives and asks to consult the notorious book. Nancy is seduced by the young man and lends the Necronomicon to him. But soon Dr. Armitage arrives and guards the book in the glass box. Then they go to a restaurant and Wilbur says that he lives in Dunwich. When Dr. Armitage and Elizabeth leave the restaurant, Nancy offers to drive him home. When they arrive at the Whateley's home, she accepts a spiked tea and Wilbur sabotages her car. Nancy decides to stay at his house, but she does not know that Wilbur wants to conjure the Old Ones and Nancy and the Necronomicon are essential for his purpose.