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.
Filmography links and data courtesy of The Internet Movie Database.