Fanny Price, at age ten, is sent from her impoverished home in Portsmouth to live as one of the family at Mansfield Park, the Northamptonshire country estate of her uncle, Sir Thomas Bertram. There she is mistreated by all but her elder cousin Edmund. Her aunt Norris, the wife of the clergyman at the Mansfield parsonage, makes herself particularly unpleasant.When Fanny is fifteen, Aunt Norris is widowed and the frequency of her visits to Mansfield Park increases, as does her mistreatment of Fanny. A year later, Sir Thomas leaves to deal with problems on his plantation in Antigua, taking his spendthrift eldest son Tom. Mrs Norris, looking for a husband for Maria, finds Mr Rushworth, who is rich but weak-willed and considered stupid, and Maria accepts his proposal.The following year, Henry Crawford and his sister, Mary, arrive at the parsonage to stay with their half-sister, the wife of the new incumbent, Dr Grant. With their fashionable London ways, they enliven life in Mansfield. Edmund and Mary then start to show interest in one another.On a visit to Mr Rushworth's estate, Henry flirts with both Maria and Julia. Maria believes Henry is in love with her and so treats Mr Rushworth dismissively, provoking his jealousy, while Julia struggles with jealousy and resentment towards her sister. Mary is disappointed to learn that Edmund will be a clergyman and tries to undermine his vocation. Fanny fears that Mary's charms are blinding Edmund to her flaws.After Tom returns, he encourages the young people to begin rehearsals for an amateur performance of the play Lovers' Vows. Edmund objects, believing Sir Thomas would disapprove and feeling that the subject matter of the play is inappropriate for his sisters. But after much pressure, he agrees to take on the role of the lover of the character played by Mary. The play provides further opportunity for Henry and Maria to flirt. When Sir Thomas arrives home unexpectedly, the play is still in rehearsal and is cancelled. Henry departs without explanation and Maria goes ahead with marriage to Mr Rushworth. They then settle in London, taking Julia with them. Sir Thomas sees many improvements in Fanny and Mary Crawford initiates a closer relationship with her.