Amy and Dan continue searching for the 39 clues. This time the trail leads to Mozart’s homeland in Salzburg. They are in for adventures in the catacombs of Benedictine monks, the headquarters of Walt Disney, and races by boat through Venice. Who will win? The hip-hop star Yon Wizard? KGB agent Irina Spasskaya? The millionaire children of Cabra? Or the two orphans from Boston?