Forty-year old Charlotte Vale (Bette Davis) and her mother (Gladys Cooper), a super-wealthy heiress, live a life of leisure in a sumptuous mansion, staffed with servants and maids. Her mother is overbearing and oppressive, and she controls Charlotte's only source of income, an allowance. Charlotte and her mother had gone on a luxurious ocean cruise where Charlotte met a ship's officer and fell in love with him, but her mother, a Boston Brahmin deeply displeased at his low social class, caught them and put a stop to the relationship, sending Charlotte into reclusiveness and depression, and loss of touch with reality. Back at home, Mrs. Vale contacts famous psychiatrist Dr. Jasquith (Claude Rains) to come to the house and examine Charlotte for what seems to be mental illness. Jasquith observes their dysfunctional mother-daughter interactions and determines that Mrs. Vale is the cause of Charlotte's mental illness, and suggests that Charlotte should spend a few weeks at Cascade, Jasquith's upscale, private sanitarium. Later, wanting Charlotte to find opportunities to socialize, he suggests an ocean cruise without her mother, where Charlotte again meets a man she falls in love with and they have an affair (although she never marries). Along the way, something causes Charlotte to recover and to develop into an emotionally mature, self-confident woman, and thus a model patient. Her mother is impressed by that and, consequently, begins to show some respect for Charlotte. Mrs. Vale, who is elderly and confined to a wheelchair, tells Charlotte that if she will take care of her, then Charlotte will inherit everything. Charlotte agrees to take care of her, but Mrs. Vale dies and Charlotte inherits nearly all of the estate. From there onward, Charlotte is an independent and very wealthy heiress, completely recovered from her mental illness. It's unclear what brought about Charlotte's seemingly miraculous recovery (in 1942, there were no medications explicitly for mental illness, and none are mentioned or shown in the movie), but the implication is that Dr. Jasquith's psychiatric expertise (similarly depicted in “The Snake Pit” by Leo Genn) and emphasis on her need for socializing brought about the cure. Eventually, Dr. Jasquith invites her to become a member of Cascade's board of directors. Paid “product placement,” pioneered by Edward Bernays, is very prominent in this movie, especially in the form of frequent cigarette smoking, which is implied to induce relaxation and to enhance romantic feelings between Charlotte and her lovers. Dr. Jasquith enjoys smoking, too, and this helps to facilitate the doctor-patient relationship, almost as if to imply that tobacco might contain something that helps her recovery. The luxury cruises, where Charlotte always finds love and romance, are also a form of product placement, suggesting adventure and therapeutic value. Above all, though, psychiatric expertise is the movie's centerpiece, depicted in the form of personalized, individual therapy, available to Charlotte thanks to her mother's ability to pay for the best.