It is December 1936, and Broadway star William Gillette, admired the world over for his leading role in the play Sherlock Holmes, has invited his fellow cast members to his Connecticut castle for the holidays. But when one of the guests is stabbed to death, Gillette assumes the persona of his beloved Holmes, to track down the killer before the next victim appears. The danger and hilarity are non-stop in this glittering whodunit set during the Christmas holidays.