Defeated in battle by the warlord Arthur, Prince Drustan of the Picts is sent to the court of his uncle King March of Dumnonia as a political hostage. A cunning warrior, Drustan soon earns the trust of King March who sends him on a mission of vital importance.
When the Irish princess Esyllt learns of her betrothal to King March— man she has never met— to seal an alliance between Britons and Gaels, she knows she is about to lose everything; her family, her home and her freedom. But when she meets the brash young Drustan who is to escort her to Dumnonia, she sees a chance of happiness.
In a reckless romance that would become legend, Drustan and Esyllt plot to overthrow King March and rule Dumnonia for themselves. But in the chaos of 5th century Britain, things are never simple and both are ultimately forced to choose between love, ambition and family.