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.

Charlotte and Colbourne rush to Augusta’s aid. Tom secures a financial investment… but is delivered some devastating news. And while love blossoms elsewhere, Arthur’s heart is broken.

Charlotte attempts to distance herself from Colbourne but as they are repeatedly thrown into each other’s orbit, their chemistry rises. Meanwhile Georgiana is unravelling and makes a surprising decision to protect herself.

Georgiana gets a surprise visit. Colbourne’s shooting party goes ahead and Charlotte has to confront all that she’s lost. Mary and Tom cross swords over his plans for the old town.

Georgiana faces a nearly impossible task in trying to find a lawyer, but help arrives from a surprising place. Lady Denham accepts a new vision for the town and spars with an old flame. Arthur makes a new friend.