When Monteverdi's lost operas surface, so does a killer desperate to possess them. . .
Preoccupied with preparations for the opera season at Eszterháza, Kapellmeister Joseph Haydn receives a curious request from a friend in Vienna. Kaspar, an impoverished violinist with an ailing wife, wishes Haydn to evaluate a collection of scores reputed to be the lost operas of Monteverdi.
Haydn is intrigued until Her Majesty, Empress Maria Theresa, summons him with a similar request. Skeptical of the value of Kaspar’s bequest, Haydn nevertheless offers to help. But before he can examine the works, Kaspar is murdered—beaten and left to die in front of a wine tavern.
The police are quick to dismiss the death as a robbery gone wrong. But Haydn is not so sure. Kaspar’s keys were stolen and his house broken into. Could his bequest be genuine after all? And can Haydn find the true operas—and the man willing to kill for them?