The Five Orange Pips

È una notte strana quella in cui il dottor Watson riceve inaspettatamente la visita di Sherlock Holmes. L'investigatore più celebre di tutti i tempi, quella notte è molto diverso dal solito. È spaventato, malandato, ferito. Sta fuggendo dal suo più acerrimo nemico, il diabolico Professor Moriarty. È il criminale più spietato, un autentico genio del male, un avversario insidioso dalle alleanze potenti.

 Dr. Watson is called upon late at night by a female friend of his wife whose husband has been absent for several days. Frantic with worry, she seeks help in fetching him home from an opium den. Watson finds his friend Sherlock Holmes in the den, disguised as an old man, trying to extract information about a new case from the addicts therein. 

Dr. Watson recounts that a masked visitor to Baker Street is quickly deduced to be the hereditary King of Bohemia. The King is to become engaged to a young Scandinavian princess. However, five years before, he had a liaison with American opera singer, Irene Adler. Fearful that the marriage would be called off, he had sought to regain letters and a photograph of Adler and himself together. The ensuing adventure involves disguise, subterfuge and Holmes' legendary powers of deduction.

In "A Case of Identity", Miss Mary Sutherland, a woman with a substantial income, is engaged to a quiet Londoner who has recently disappeared. Of the fiancé, Mr. Hosmer Angel, Miss Sutherland only knows that he works in an office in Leadenhall Street. All his letters to her are typewritten, even the signature, and he insists that she write back to him through the local Post Office. The climax of the sad liaison comes when Mr. Angel abandons Miss Sutherland at the altar on their wedding day. Holmes reaches a conclusion quite quickly and advises his client to forget Mr. Angel.

A young London engineer, contracted to service a hydraulic press at a country house, discovers that the owner is using the machine for illegal purposes. After confronting the owner, the engineer narrowly escapes death and loses a thumb when the owner turns on him. Sherlock Holmes deduces the actual use of the machine and sets off to bring the evildoers to justice.