The Riddle

A journalist investigates a series of murders that follows the discovery of an unpublished novel by Charles Dickens in the cellar of an old Thames-side-pub. Gradually he becomes obsessed with unraveling a century-old murder in the pages of the manuscript. Only when he has done so, with the help of a mysterious beach-combing tramp who stalks the Thames foreshore, is he able to solve the modern murders.