Sherlock Holmes and the Giant Rat of Sumatra

In the autumn of 1898, the Docklands of London are stunned by the arrival of Clipper: the 'Matilda Briggs,' which has apparently drifted into a vacant berth. The only crew member still on board is a young cabin boy and he is in the throes of death. Consulting detective, Sherlock Holmes, is called to investigate the matter but what will he uncover?