Christmas Calamity at the Vicarage

The event of Compton Poppleford's festive season has arrived: the Vicarage Christmas Party. With sherry, mince pies and Christmas carols, the festivities are going well. But events take a turn when the choirmaster is found dead in the parlour. Which of the guests could possibly commit murder at Christmas time?
With everyone detained at the vicarage, elderly sleuths Churchill and Pemberley find themselves in all the wrong places at all the wrong times. Inspector Mappin is certain they're his suspects and the vicar is convinced too. How can the two old ladies prove their innocence? With the net closing in, the detective duo must find the culprit to avoid spending Christmas in Compton Poppleford's police cells.