Emperor Caligula has gone mad. After murdering his sister's husband, he sends her into exile and adopts her son Lucius to raise as his own. Guided by Caligula's cruelty, the boy soon becomes a man with his own legacy: the infamous Nero, whose rule is haunted by bloodlust, deception and vengeance. Seizing power with a counterfeit will, the paranoid Emperor Nero battles perceived enemies at every turn. No one, not even his own mother, is safe from his reign of terror. As he spirals deeper into a vicious cycle of loneliness, betrayal and murder, Nero becomes Rome's worst nightmare.