A chance encounter brings Charlotte Heywood to the developing seaside resort of Sanditon, where she meets the town’s eclectic residents, including brooding bachelor Sidney Parker and the mysterious Miss Lambe.
Lady Denham plans an elaborate luncheon to welcome the wealthy West Indian heiress Miss Lambe to town – and to seal a match for her nephew, Edward. Charlotte and Sidney have an awkward confrontation.
In the wake of an uncomfortable encounter, Charlotte does all she can to avoid Sidney, but an emergency unites them. An angry Young Stringer confronts Tom Parker over an injustice. Meanwhile, Tom finds a doctor for the town, but Lady Denham proves hard to win over.
Charlotte and Sidney clash over Miss Lambe’s love life, and Charlotte strikes up a new friendship. At Denham House, Clara witnesses a scene that raises her suspicions. Lord Babington makes his romantic intentions known, but faces being rebuffed.
Tensions come to a head when Young Stringer, desperate for answers, threatens a worker boycott of the annual cricket match with Sanditon’s gentlemen. Charlotte and Miss Lambe hatch a secret plan sure to draw ire from Sanditon’s residents.
Charlotte and Sidney must reconcile enough in order to search for a missing Sanditon resident. Meanwhile, Tom fights to save Sanditon and his marriage, and Edward and Clara hatch a cunning plot to seize Lady Denham’s legacy.