In January 1817, Jane Austen commenced work on a new novel, to which she never assigned a name. By mid-March, she had completed twelve chapters, at which time she ceased working due to illness. The unfinished work was eventually published in 1925 under its working title: Fragment of a Novel Written by Jane Austen, January–March 1817. It has since become known simply as Sanditon, and a number of completions by other authors have since been published.

Mr. and Mrs. Parker are visiting Sanditon, a village on the coast of Sussex. Unfortunately, Mr. Parker suffers an injury but he receives assistance from a local farmer, Mr Heywood. The latter's daughter, Charlotte, is of marriageable age and has three eligible suitors, including the son of local patron, Lady Denham.

Lady Denham is very keen to find a suitable match for her son Sir Edward—one of Charlotte's suitors. Accordingly, she seeks an introduction with a Miss Lambe, a wealthy young heiress from the West Indies who is to take lodgings at Sanditon. Meanwhile, Charlotte finds herself attracted to the witty and debonair Sydney.

The narrative ceases at this point, with little indication about the final results of the various romantic encounters. However, it appears clear that Charlotte is intended to be the heroine of the story.