Venice. 1756 A city of witty courtesans, wealthy merchants, dashing sea captains and world-famous adventurers. One of these adventurers is the legendary Pietro Viravolta. A scientist, poet and “soldier of fortune,” he is in the secret service of the head of the all-knowing, all-seeing Council of Ten, which governs the Venetian Republic. This time, a difficult task awaits him... Venice is shaken by a series of monstrous murders, and Viravolta is tasked with finding out who is behind them. Aristocratic conspirators or members of a secret occult society? Or maybe “hired blades” sent by one of the foreign diplomats weaving sophisticated political intrigues in Venice? Pietro begins an investigation. But the mysterious killers are one step ahead of him again and again...