When a night at the opera turns to murder, master sleuth Sherlock Holmes and the illustrious Dr Watson once again find themselves embroiled in a spell-binding mystery in Sherlock Holmes and The Leading Lady. In 1910 Vienna, a horrible explosive device has just been invented... and stolen. The possessor of such a weapon could bring the world to it's knees. The great Sherlock Holmes is summoned by the British Prime Minister to go to Austria to solve the case. But Holmes never suspects the mystery will reunite him with the one love of his life, Irene Adler. At last Holmes meets his match and succumbs to romance! The beautiful opera singer joins Holmes and Dr. Watson on a harrowing race across Europe to stop an intricate spy network from carrying out their deadly plans. From the foggy London streets to breathtaking Vienna and the alluring opera world. From a grand costumed ball and romantic sleigh rides in the Australian countryside to the dens of decadence in the exotic land of Algiers. Each step of the trail leads the trio closer to the solution...and to a brutal murder. Soon no one can be trusted not even the world renowned Sigmund Freud and George Bernard Shaw. Even the one lady of Holmes s life becomes a suspect. Ultimately Holmes and Watson enter a desperate race against the clock when they discover the deadly weapon will be put to it s first test on the opening night of the opera, a test that will alter the course of history forever!