There are several key details missing from this synopsis, and it also appears to not accurately describe the movie Gaslight. Here is a corrected synopsis of the film:
In Gaslight, Meesha (played by Ingrid Bergman) is a young woman who returns to the London home of her aunt and uncle after spending years in Italy. She meets the charming and suave Gregory Anton (Charles Boyer), who soon becomes her husband. However, Meesha begins to notice strange occurrences in their home - things disappear, gaslights flicker, and she hears footsteps in the attic. When she brings up these concerns to Gregory, he dismisses them and makes her doubt her own sanity.
As the movie progresses, it becomes clear that Gregory is intentionally manipulating Meesha to make her think she is going insane. He is actually searching for her aunt's hidden jewels, and believes that Meesha knows where they are hidden. He convinces her that she is losing her mind so that she will be discredited if she tries to tell anyone about his theft.
Eventually, Meesha begins to unravel the truth and discovers the extent of Gregory's gaslighting. He tries to kill her, but she is saved by a detective who has been investigating Gregory's past. In the end, Gregory is caught and Meesha is redeemed - she regains her confidence and independence.
Gaslight is a classic film noir thriller, and is known for its masterful use of tension and suspense. The performances by Bergman and Boyer are particularly noteworthy, and the film was a critical and commercial success upon its release in 1944.