Poppy and Graham are staying in a grand country house for the weekend to help at a family christening party, but they're seriously unimpressed. Dull, dull, dull! Not to mention the fact that baby Marmaduke has taken a shine to Graham and won't let him out of his sight without shrieking the place down. Then events take a mysterious turn when a filthy tramp turns up in the churchyard ... dead. As Poppy and Graham begin to dig around, they realize that all is not as it seems..