One fine day, AD 70, Sosia Camillina quite literally runs into Marcus Didius Falco on the steps of the Forum. It seems Sosia is on the run from a couple of street toughs, and after a quick and dirty rescue, PI Falco wants to know why. Falco finds out that Sosia, the niece of a highly placed senator, holds the secret to a stockpile of silver pigs, ingots intended for no good use. Hoping for future favours from Sosia's powerful uncle, Falco embarks on an intricate case of smuggling, murder, and treason that reaches into the palace itself. And if he does not tread lightly, the treacherous puzzle of the silver pigs could buy him a one-way ticket to his own funeral pyre.