Plot summary
On his deathbed, Henry Dashwood makes his son, John, promise to provide for his stepmother and half-sisters, Elinor, Marianne and Margaret, from his inheritance. John's wife Fanny instead persuades him not to support them financially, leaving them a greatly reduced income.
Fanny's brother Edward Ferrars arrives for a visit. When he and Elinor seem to be growing close, Fanny warns Mrs Dashwood that their mother has higher goals for Edward. Affronted, Mrs Dashwood moves her family to Barton Cottage in Devonshire, which her second cousin, Sir John Middleton, offered for a low rent. Later, while dining with the Middletons at Barton Park, family friend Colonel Brandon is attracted to Marianne. However, he is aged thirty-five, which seems too old to sixteen-year-old Marianne's romantic sensibilities.
While out walking, Marianne sprains her ankle. John Willoughby happens upon her and carries Marianne home. During subsequent visits, their similar artistic taste causes Marianne to fall in love with him, abandoning caution and propriety. Just as an engagement seems imminent, Willoughby informs the Dashwoods that his elderly cousin Mrs Smith, whom he is financially dependent upon due to his debts, is sending him to London indefinitely on business. Marianne is left distraught.
When Edward Ferrars visits Barton Cottage, he seems subdued. Shortly afterwards, sisters Anne and Lucy Steele, vulgar cousins of Sir John's mother-in-law, Mrs Jennings, stay at Barton Park. While there, Lucy confides to Elinor that she and Edward are secretly engaged, giving Elinor an insight into Lucy's jealous and calculating nature.
Mrs Jennings invites the elder Dashwood sisters to visit her in London. After Marianne's letters to Willoughby go unanswered, they unexpectedly meet at a ball. Willoughby, there with another woman, greets Marianne coldly, later informing her he is betrothed to the rich Miss Grey. Marianne is heartbroken but tells Elinor that she and Willoughby never were engaged.
Colonel Brandon reveals to Elinor that Willoughby had earlier seduced and abandoned Brandon's teenaged ward, Eliza Williams. Willoughby's cousin has consequently disinherited him, which explains his need to marry an heiress. Meanwhile, the Steele sisters come to London and are invited to stay at John and Fanny Dashwood's London house in preference to Elinor and Marianne. Based on their cordiality, Anne mistakenly believes that the Ferrars have become fond enough of Lucy to welcome her into the family and reveals Lucy's engagement to Edward. As a result, the sisters are dismissed from the house, and Edward's wealthy mother orders him to break off the engagement. When Edward refuses, he is disinherited in favour of his younger brother. On learning this, Colonel Brandon shows his admiration for Edward's honourable conduct by offering him the nearby parsonage, allowing him and Lucy to marry after he is ordained.
Mrs Jennings takes the Dashwood sisters to visit her second daughter as they journey back to Devonshire. Marianne goes walking in the rain and contracts putrid fever. When Marianne's condition worsens, Elinor writes home. Colonel Brandon, who has been accompanying them, volunteers to bring Marianne's mother. That night, Willoughby arrives and tells Elinor that he genuinely loved Marianne. However, the callous way he talks about Eliza and his wife lessens Elinor's pity for him.
Marianne recovers, and learning of Elinor's own silent heartache, is ashamed of her ostentatious grief and vows to be guided by her sister's good sense and amend her future behaviour.
After their return home, a family servant happens to encounter Lucy at a nearby market town and brings back news that she is now Mrs Ferrars. This final act of spite becomes obvious when Edward arrives to reveal that Lucy had jilted him and married his now wealthy younger brother. After being ordained, Edward marries Elinor, while Marianne later marries Colonel Brandon. The two sisters can now harmoniously live as neighbours.