It's hi-jinks on the high seas when Benji, Bobby and Huey set sail on the cruise of a lifetime. While his friends walk the plank of mischievous mayhem, it is Benji who goes overboard for the Captain's daughter.

When Watson reads from the newspaper there have been two similar murders near Whitechapel in a few days, Sherlock Holmes' sharp deductive is immediately stimulated to start its merciless method of elimination after observation of every apparently meaningless detail. He guesses right the victims must be street whores, and doesn't need long to work his way trough a pawn shop, an aristocratic family's stately home, a hospital and of course the potential suspects and (even unknowing) witnesses who are the cast of the gradually unraveled story of the murderer and his motive.