Who's been tampering with the graves in St Swithun's churchyard? Elderly detectives Annabel Churchill and Doris Pemberley are asked to investigate by Mr Grieves the sinister sexton. Meanwhile the sleepy English village of Compton Poppleford is rocked by the murder of its favourite philanthropist, Mr Butterfork. Who could have possibly wished to harm him?

When the murderer leaves clues in the churchyard, Churchill and Pemberley are keen to solve the case. But Churchill finds herself distracted by the charms of debonair Mr Pickwick and his art gallery. A night-time fright in the churchyard brings her to her senses and the ageing detective duo are soon convinced of their suspect. The trouble is, they could be completely mistaken...