It is 1791 and Wolfgang Amadeus Mozart is enlightenment Vienna's brightest star. Master of the city's music halls and devoted member of the Austrian Freemason's guild, he stands at the heart of an electric mix of art and music, philosophy and science, politics and intrigue. Six weeks ago, the great composer told his wife he had been poisoned. Yesterday, he died. The city is buzzing with rumours of infidelity, bankruptcy and murder. But Wolfgang's sister Nannerl, returned from the provinces ...