Happily married and settled at Pemberley, Elizabeth Darcy's mind inevitably turns to securing a similar happiness for those around her – namely, for her sister-in-law and friend, Georgiana Darcy.

When word reaches them of their cousin Colonel Fitzwilliam's plans to visit Derbyshire during the summer, Lizzy decides they must celebrate the Christmas he was unable to mark in winter. The unusual festivities capture everyone's imaginations, and prompt Mr and Mrs Darcy to spot the possibility of romance between Georgiana and Colonel Fitzwilliam – but are they mistaken or will love triumph at Christmas, even a Christmas celebrated in summertime?