The king Cymbeline had two sons that were lost a long time ago. When he has a daughter as a last child who becomes enamoured and married to Roman official in his court. When Cymbeline refuses to pay the tribute to the Roman emperor, the wrath of the Romans comes down on the vassal king of Britain. Cymbeline must deal with this while also dealing with her murderous wife who is trying to secure the throne for her own children from a different marriage to secure her bloodline.