Sherlock Holmes (
Basil Rathbone) and Dr Watson (
Nigel Bruce) investigate a case of little wooden musical boxes which hold a clue to the location of a property so hot a gang are prepared to kill for them. The boxes were made by a convict who stole the plates to print £5 notes in the Bank of England, the boxes containing the coded location of the plates. Unfortunately for the gang led by Hilda Courtney (
Patrica Morrison) the boxes are sold before they can get their hands on them...
Holmes and Watson get involved in the case after one of Watson's friends (Edmund Breon) is killed over the musical box he bought. Holmes enters a battle of wits with Courtney who in many ways proves to be his equal...
An enjoyable little Sherlock Holmes mystery with the usual clever deductions and no small amount of suspense and tension. This was the last in the long series of Sherlock Holmes films made by Rathbone and Bruce and the series certainly went out on a high.
