Venice, 1745-an age of reckless pleasures, playful artifice, and baroque excess. An accident has reduced Tito Amato's glorious singing voice to a husky croak. A tragedy- but also an opportunity. The once celebrated male soprano is now determined to prove himself as a director. With the theater losing subscribers to a rival company headed by an unscrupulous impresario, San Marco's Maestro Torani charges Tito with locating the perfect opera to fill the seats in time for the opening of Carnival. Surprisingly, a second-rate composer provides the very thing-an opera so replete with gorgeous melodies the public speculates it was written by the late Antonio Vivaldi. Even more disconcerting are the rumors swirling around Angeletto, a male soprano imported from Naples to sing the lead. Is the singer truly a castrato or a female soprano engaging in a daring but lucrative masquerade? Both matters lead the perplexed Tito into dangerous waters that turn murderous when Maestro Torani undergoes a series of increasingly vicious attacks ending in his death. And Tito is the prime suspect. His own life as well as the future of Teatro San Marco now depend on his skills as a sleuth