Northanger Abbey follows seventeen-year-old Gothic novel aficionado Catherine Morland and family friends Mr. and Mrs. Allen as they visit Bath. It is Catherine's first visit there. She meets new friends, such as Isabella Thorpe, and goes to balls. Catherine finds herself pursued by Isabella's brother, the rough-mannered, slovenly John Thorpe, and by her real love interest, Henry Tilney. She also becomes friends with Eleanor Tilney, Henry's younger sister. Henry captivates her with his view on novels and his knowledge of history and the world. General Tilney (Henry and Eleanor's father) invites Catherine to visit their estate, Northanger Abbey, which, from her reading of Ann Radcliffe's Gothic novel The Mysteries of Udolpho, she expects to be dark, ancient and full of Gothic horrors and fantastical mystery.

Fanny Price is a young girl from a large and relatively poor family, who is taken from them at age 10 to be raised by her rich uncle and aunt, Sir Thomas, a baronet, and Lady Bertram, of Mansfield Park. She had previously lived with her own parents, Lieut. Price and his wife, Frances (Fanny), Lady Bertram's sister. She is the second child and eldest daughter, with seven siblings born after her. She has a firm attachment to her older brother, William, who at the age of 12 has followed his father into the navy. With so many mouths to feed on a limited income, Fanny's mother is grateful for the opportunity to send Fanny away to live with her fine relatives.