As described in a
film magazine, Poppea (Duval) conspires with Tullius (Trento), the emperor's favorite soldier, to have her carried, apparently against her wishes, to Nero's court, where she is sure that she can make him her slave. In return for his part in the plot, Tullius demands to be made governor of Cyprus. Poppea's husband protests in vain, and, refusing to follow Nero's suggestion that he slay himself, joins the legions outside of Rome. The young soldier Horatius (Salvini) while escorting the princess Marcia (Mersereau), a hostage to Nero, to her destination, falls in love with her. He goes to Spain and, when he comes back victorious, Nero (Grétillat) offers him whatever he asks in return for his valor. Horatius asks but for the fair barbarian princess and Nero gives his word. Meanwhile Tullius, ignored by Poppea, plans to usurp her place by bringing Marcia before Nero. Horatius discovers that Marcia has embraced the new religion Christianity and will not consider marrying him unless he converts. When he tries to force his love on her, she cries out for help and Mount Vesuvius erupts, and the ardent soldier falls beneath a pillar. Nero, upon seeing Marcia, desires to withdraw his word, but a storm arises and Haracius carries Marcia to safety. Irked and a prey to ennui, Nero listens to Tullius and permits him to set fire to Rome to inspire Nero's muse. When the people discover what has happened, they cry out against Nero. Poppea suggests that the people be told that the Christians set the fire, and the fickle people believe the lie, saving Nero from their just wrath. The persecutions of the Christians now begins, and Marcia and her slave are among those destined to be fed to the lions. Then the huge servant breaks the lion's jaw. Meanwhile, the legions have revolted against their oppressor and arrive during the exhibition in the arena. Nero flees but, when he cannot escape, commits suicide. Poppea, brutally kicked by Nero, dies in her betrayed husband's arms. Horatius's father Galba (Carotenuto) is proclaimed emperor, and Horatius embraces Christianity for a happy ending. ==Cast==