A group of strangers are stranded in a boarding house during a snow storm, one of whom is a murderer. The suspects include the newly-married couple, a spinster with a curious background, and architect who seems better equipped to be a chef, a retired army major, a strange little man and a jurist who makes life miserable for everyone. Into their midst comes a policeman who no sooner arrives, than the jurist is killed. Two down and one to go. To get to the rational of the murder's patter, the policeman probes the background of everyone present, and rattles a lot of skeletons. Another Agatha Christie switch finish.