Gaslight

In London, at 9 Thorton Square, prima donna Alice Alquist is strangled, and her famous jewels disappear. Her young niece Paula Alquist (Terry Moore) is sent to Italy to study music, and the house stays empty. Ten years later, Paula (Ingrid Bergman) decides to get married with an older pianist named Gregory Anton (Charles Boyer), who convinces her to move back to the old address in London. When they arrive, Paula finds a letter from a mysterious and unknown Sergis Bauer, which makes Gregory upset. He psychologically begins to torture Paula, and she has a nervous breakdown, and also has insecurity and memory problems. When Scotland Yard Police Constable Brian Cameron (Joseph Cotten) sees Gregory and Alice in a place popular with tourists, he immediately he sees Paula, who reminds him of her aunt, but he does not know Gregory, and decides to investigate and find evidence to connect Gregory with the unsolved murder, while Paula is being driven insane and menaced by her husband.