A fun read, but maybe not a stand-out mystery. A group of passengers are thrown together when their train is stopped in a snowstorm; rather than await their fate after 24 hours on a freezing train, they set off to find Hemmersby station, where they hope to continue their journeys. But they snow forces them to take shelter in an empty country home, mysteriously set up for tea and visitors. From there the mystery unwinds, with unexpected visitors, a spooky portrait, a bread knife dropped on the kitchen floor, an empty garret room (or is it?), and other developments too numerous to mention. The snowy setting is used to good effect and the mystery is solved just in time for Christmas dinner.