Amy and Dan find themselves in Vienna, where they search for clues while evading their enemies, and attempt to discover the truth about their famous ancestors, Wolfgang Amadeus Mozart and his sister Nannerl.
"Robbed on the train platform as soon as he arrives in the city, eleven-year-old Oscar Starling soon finds himself in the middle of the Great Chicago Fire when he chases after his thief, who is herself in need of rescue." --.
Robbed on the train platform as soon as he arrives in the city, eleven-year-old Oscar Starling soon finds himself in the middle of the Great Chicago Fire when he chases after his thief, who is herself in need of rescue.
