It's the off-season at the lonely Beauregard Hotel in Bournemoth, and only the long-term tenants are still in residence. Life is stirred up, however, when the beautiful Ann Shankland arrives to see her alcoholic ex-husband, John Malcolm, who is secretly engaged to Pat Cooper, the woman who runs the hotel. Meanwhile, snobbish Mrs Railton-Bell discovers that the kindly if rather doddering Major Pollock, played by David Niven, who won an Oscar for his performance, a retired officer who likes to find out more...

Holmes, Watson and a plethora of potty passengers are all aboard the London to Edinburgh express. As the train rattles on its way, so does the mayhem, with a corpse turning up in a carriage and a false-bottomed coffin in the guard's van. Will the stealthy sleuths solve the mystery? Elementary... As fast-paced, tightly-woven a Sherlock Holmes mystery as you will find. find out more...