The film is now in the public domain and can be viewed in its entirity below.
A serial killer known as "The Avenger" is on the loose in London, murdering blonde women. A mysterious man arrives at the house of Mr. and Mrs. Bunting looking for a room to rent. The Bunting's daughter is a blonde model and is seeing one of the detectives assigned to the case. The detective becomes jealous of the lodger and begins to suspect he may be the avenger.
This movie directed by Alfred Hitchcock was based on the book of the same name, by Marie Belloc Lowndes. It was the first book to offer a solution to the Jack The Ripper killings. The book is supposedly based on an anecdote told to the painter Walter Sickert by the landlady when renting a room; she said that the previous tenant had been Jack the Ripper.