It's Christmas and James and Beth are preparing for Harrington's festive dinner and dance. This year, famous diva Olivia Dupre is singing; a wedding is taking place and they're hosting a reunion of PALs - ex-army comrades from the Great War. When Olivia falls ill and claims she's been poisoned, James puts his sleuthing hat on. But things take a sinister turn when a further attack takes place.  What secret is Major Carlton hiding? Who is writing evil poison-pen letters? What relevance does the discarded diary have? Join James, and the Cavendish regulars, as he battles to solve the crime and bring a ruthless killer to justice.