S1, E1: Rome, 24-9 BCE. Nearing the end of his life and surrounded by spies, Claudius, emperor of Rome, writes his family history. His tale begins during the reign of Augustus, with his treacherous grandmother, Livia, scheming to advance the career of her son, Tiberius. Her machinations prove deadly for many family members, but Tiberius’s brother, Drusus, threatens her plans.