Soon after Albia's marriage, palace officials ask her to identify a traitor who has helped another man claim to be the dead emperor Nero. Earlier pretenders had found support in the eastern provinces, making even an implausible claimant a political danger to Domitian.
Albia enters a world of informers, intercepted messages and competing imperial agencies while Manlius Faustus recovers from serious injury. She must find the official protecting the pretender before the conspiracy can turn dissatisfaction with Domitian into open revolt.