Holmes and the police are investigating the disappearance of a businessman who was last seen at the same opium den.  They arrest a dirty, disfigured beggar called Hugh Boone  that they believe has murdered Mr St Clair.  However, several days later Mr St Clair’s wife receives a letter from her husband that forces Sherlock and the police to reconsider the case….

The Sherlock Holmes series is a collection of short stories written by Arthur Conan Doyle. It is now rewritten in easily accessible, clear, modern English.