Frances Shore is a cartographer by trade, a maker of maps, but when her husband's work takes her to Saudi Arabia she finds herself unable to map the Kingdom's areas of internal darkness. The regime is corrupt and harsh, and the streets are not a woman's territory; so she becomes confined in her flat. As her days empty of certainty and purpose, her life becomes a blank – waiting to be filled by violence and disaster.
Rome, AD 34: Vespasian is serving as a military officer on the outskirts of the Empire. But political events in Rome - Tiberius's increasing debauchery, the escalating grain crisis - draw him back to the city. When Caligula becomes Emperor, Vespasian believes that things will improve. Instead, the young emperor deteriorates from Rome's shining star to a blood-crazed, incestuous, all-powerful madman.