Super sleuth Sherlock Holmes (Basil Rathbone) investigates the deaths of two random individuals--including Dr. Watson's old friend Julian "Stinky" Emery (Edmond Breon)--found murdered after purchasing identical music boxes from an auction house in London. Tracing the items back to a prison inmate who stole a series of printing plates from the Bank of England, Holmes begins to suspect the music boxes reveal a secret code to the hidden loot's whereabouts. It's a nailbiting race against time as Holmes tangles with a murderous gang led by the formidable Hilda Courtney (Patricia Morison) in his attempt to recover the last of the three boxes and decipher its hidden secrets. DRESSED TO KILL marks the 14th and final time Rathbone would star as the master detective.