Six people sit down to dinner at a table laid for seven. In front of the empty place is a sprig of rosemary - in solemn memory of Rosemary Barton who died at the same table exactly one year previously. No one present on that fateful night would ever forget the woman's face, contorted beyond recognition - or ....
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.