The Ashfordly team find themselves investigating an Agatha Christie styled mystery involving an elderly women who was found dead in a household filled with secrets and deceit. Meanwhile, Aunt Mary is reunited with an old flame who makes her a tempting offer that will mean big changes in her life. Elsewhere, Greengrass attempts to forge an alliance with two con-men who are making a fortune at villagers' expense, whilst Ventress gives up smoking to win a bet with Bellamy.