What's a horror film without Boris Karloff? Boris, the greatest film monster actor of all time, takes center stage in this "menagerie of horrors" (Motion Picture Daily) that "spins out shock after shock" (Boxoffice). Like a deadly potion bubbling with eerie mansions, secret experiments and a warning never to look in the basement, this is "pure haunted-house hokum all the way" (Los Angeles Times)! A mad English scientist (are there any other kind?) entertains a young American visitor, serving up tea, terror and a terrific-looking daughter - who is soon torn between her father's evil ways and her need to protect the man she loves from a diabolical end.