The deadliest county in England

It is Christmas in Midsomer and a shot rings out from the Villiers' home, Draycott House. Nine years later the entire family reunites again at the house. Meanwhile DCI Barnaby heads home for Christmas - but things have a habit of happening around the season of goodwill.

The Villiers family return home from church, Aunt Lydia gets locked in the garage and the engine of the car starts itself.
Lydia is rescued in the nick of time, however, later that evening she has an unfortunate fall down the stairs. The two detectives take a break from Christmas festivities to investigate.