Hitchcock's third feature film "The Lodger: A Story of the London Fog" is based on the novel "The Lodger" by Marie Belloc Lowndes and the play "Who Is He?" co-written by Belloc Lowndes, the film is about the hunt for a "Jack the Ripper"-like serial killer in London.

When a landlady (Marie Ault) and her husband (Arthur Chesney) take in a new lodger (Ivor Novello), they're overjoyed: He's quiet, humble and pays a month's rent in advance. But his mysterious and suspicious behavior soon has them wondering if he's the killer terrorizing local blond girls. Their daughter, Daisy (June), a cocky model, is far less concerned, her attraction obvious. Her police-detective boyfriend (Malcolm Keen), in a pique of jealousy, seeks to uncover the lodger's true identity.