In 1769, a British naval officer brings his daughter to live at the palatial home of his uncle and aunt, Lord and Lady Mansfield (Tom Wilkinson and Emily Watson). The couple are concerned that the girl’s presence will compromise the family’s reputation, as not only is the girl illegitimate, but her mother was black.
Nevertheless, they agree to take the girl in and raise her alongside her white cousin.
Though England was then the center of the world slave trade, Belle’s opening suggests that its titular heroine—whose full name is Dido Elizabeth Belle Lindsay (Gugu Mbatha-Raw)—will be sheltered from society’s racist attitudes and abuses. As the story skips forward to her emergence as a young woman, however, we learn that’s not the case.
Lord and Lady Mansfield clearly love Dido, but a double standard emerges when she and her cousin, Elizabeth (Sarah Gadon), are old enough to seek a husband. Elizabeth is encouraged, but Dido is warned that no family of an appropriate societal rank is likely to want her. When a pair of eligible men and their parents are invited to the house, she’s not even permitted to dine at the family table.