Time to bring in reinforcements. The get together again. Pandemonium isn't a word Marjorie Snellthorpe is used to, but when an array of eccentric guests descend on her London home, along with a quirky cook and a large dog, even Edna Parkinton's advice is welcome. With her son Jeremy and his extravagant wife Octavia swanning off elsewhere, Horace calls in the ever capable Faith Weathers to help manage the unruly crowd. During a visit to a Christmas market one of the guests dies under suspicious circumstances. Marjorie and her senior friends are determined to find the person responsible and protect one of her own from being arrested by the officious detective inspector in charge of the case.