First century Rome is plagued by all the evils the have beset major cities since time immemorial: crime, corruption, squalor, and worst of all, tourists. When a barge full of those entitled creatures arrives in Rome, they hit all the touristy hot-spots (the Amphitheatre, the Capitol, the dodgy bars with dubious entertainments) before departing for the next destination--leaving behind one of their party, dead and floating in the Tiber. While the authorities...