Imogen and Posthumus at Milford Haven. Dressing himself enviously in Posthumus's clothes, he decides to go to Wales to kill Posthumus, and then rape, abduct, and marry Imogen. Imogen has now been travelling as Fidele through the Welsh mountains, her health in decline as she comes to a cave: the home of Belarius, along with his "sons" Polydore and Cadwal, whom he raised into great hunters. These two young men are in fact the British princes Guiderius and Arviragus, who themselves do not realise their own origin. The men discover Fidele, and, instantly captivated by a strange affinity for "him", become fast friends. Outside the cave, Guiderius is met by Cloten, who throws insults, leading to a sword fight during which Guiderius beheads Cloten. Meanwhile, Imogen's fragile state worsens and she takes the "poison" as a hopeful medicine; when the men re-enter, they find her "dead." They mourn and, after placing Cloten's body beside hers, briefly depart to prepare for the double burial. Imogen awakes to find the headless body, and believes it to be Posthumus because the body is wearing Posthumus's clothes. Lucius' Roman soldiers have just arrived in Britain and, as the army moves through Wales, Lucius discovers the devastated Fidele, who pretends to be a loyal servant grieving for his killed master; Lucius, moved by this faithfulness, enlists Fidele as a pageboy. The treacherous Queen is now wasting away due to the disappearance of her son Cloten. Meanwhile, despairing of his life, the guilt-ridden Posthumus enlists in the Roman forces as they begin their invasion of Britain. Belarius, Guiderius, Arviragus, and Posthumus all help rescue Cymbeline from the Roman onslaught; the king does not yet recognise these four, yet takes notice of them as they go on to fight bravely and even capture the Roman commanders, Lucius and Iachimo, thus winning the day. Posthumus, allowing himself to be captured, as well as Fidele, are imprisoned alongside the true Romans, all of whom await execution. In jail, Posthumus sleeps, while the ghosts of his dead family appear to complain to Jupiter of his grim fate. Jupiter himself then appears in thunder and glory to assure the others that destiny will grant happiness to Posthumus and Britain. Cornelius arrives in the court to announce that the Queen has died suddenly, and that on her deathbed she unrepentantly confessed to villainous schemes against her husband and his throne. Both troubled