The Deep Blue Sea

The Deep Blue Sea movie synopsis:  Set 'around 1950', The Deep Blue Sea tells the story of Hester Collyer, the younger wife of High Court judge Sir William Collyer, who has embarked on a passionate affair with Freddie Page, a handsome young RAF pilot troubled by his memories of the war.
The majority of the film takes place during one day in Hester's flat, a day on which she has decided to commit suicide. Her attempt fails and as she recovers, the story of her affair and her married life is played out in a mosaic of short and sporadic flashbacks. We soon discover the constraints of Hester's comfortable marriage, which is affectionate but without sexual passion.

Wikipedia: The Deep Blue Sea
Check out the trailer below!