When Sherlock Holmes tragically disappears into the Reichenbach Falls with Professor Moriarty, his sworn enemy, Billy, Charlie, and Tom - and Watson the cat - must begin a new life without their mentor. But an unexpected encounter brings our young heroes a mysterious kidnapping case. The junior detective team finds itself in a secret war against the former associates of Professor Moriarty, and a series of twists and dangerous pitfalls leads to a terrible tragedy. Nothing will ever be the same for the Baker Street Four!
