The story, set in ancient Rome during the final years of Emperor Nero's reign, AD 64–68, combines both historical and fictional events and characters, and compresses the key events of that period into the space of only a few weeks. Its main theme is the Roman Empire’s conflict with Christianity and persecution of Christians in the final years of the Julio-Claudian line. Unlike his illustrious and powerful predecessor, Emperor Claudius, Nero proved corrupt and destructive, and his actions eventually threatened to destroy Rome's previously peaceful social order.