Overweight Boston spinster Charlotte is a repressed, self-esteemless woman completely dominated by her wealthy mother, Mrs. Henry Vale. When her sister-in-law Lisa Vale brings her friend Dr. Jaquith, a renowned psychiatrist, to visit Charlotte, he invites her to spend some time in his sanitarium. Soon Charlotte transforms into a sophisticated, confident woman and takes a cruise to South America. She meets married architect Jerry Durrance and they have a love affair in Rio de Janeiro. Six months later she returns home and confronts her mother with her independence. One day they have an argument and her mother has a heart attack and dies. Charlotte inherits the Vale fortune but feels guilty for her mother's death. She decides to return to Dr. Jaquith's sanitarium, where she befriends Jerry's 12-year-old daughter Tina, who has been rejected by her mother. Charlotte takes Tina home to Boston with her and one day Jerry brings Dr. Jaquith to visit them there. Written by Claudio Carvalho, Rio de Janeiro, Brazil