London, 1943. Across the city prominent figures in science and the military are bursting into flame and being incinerated. Convinced that the Germans have deployed a new terror weapon, a desperate government turns to the one man who can track down the source of this dreadful menace - Sherlock Holmes.

The quest for a solution drives Holmes into an uneasy alliance with the country's most brilliant scientific genius, Professor James Moriarty. Only Holmes knows that, behind his facade of respectability, Moriarty is the mastermind behind a vast criminal empire. As they pursue the trail of incendiary murders, Holmes is quite sure that the professor is playing a double game and that there lies ahead a duel to the death which they cannot both survive.

A tribute to the classic Universal Pictures Sherlock Holmes film series starring Basil Rathbone and Nigel Bruce.