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As Caesar marches on Rome and panic erupts in the city, Gordianus the Finder discovers, in his own home, the body of Pompey's favorite cousin. Before fleeing the city, Pompey exacts a terrible bargain from the finder of secrets-to unearth the killer, or sacrifice his own son-in-law to service in Pompey's legions, and certain death. Amid the city's sordid underbelly, Gordianus learns that the murdered man was a dangerous spy. Now, as he follows a trail of intrigue, betrayal, and ferocious battles on land and sea, the Finder is caught between the chaos of war and the terrible truth he must finally reveal.