A nameless old man sits in the corner of a cozy London tea shop, and without leaving his seat, solves baffling crimes reported to him by an admiring lady journalist. Using only methods of pure deduction, the eccentric, self-assured sleuth unravels the mysteries behind a wide range of criminal acts - from gruesome murders (The Lisson Grove Mystery) and daring thefts (The Affair at the Novelty Theatre) to brilliant deceptions (The Liverpool Mystery)...