Rodney and George are to provide a dramatic interlude at the Sherlock Holmes Society's annual congress. Events turn truly dramatic when George discovers the body of Rodney's financial director, dressed as Moriarty, in Rodney's cupboard. Proudly acknowledging he's the murderer, Rodney is piqued when others make the same claim. All are thwarted when the body staggers from the cupboard and passes a suicide note to inspector Jobling-- all to the accompaniment of The Pirates of Penzance