Since the death of Ragnvald's father in battle, he has worked hard to protect his sister Svanhild and planned to inherit his family's land when he comes of age. But when the captain of his ship tries to kill Ragnvald on the way home from a raiding excursion, he must confront his stepfather's betrayal, and find a way to protect his birthright. It is no easy feat in Viking-Age Norway, where a hundred petty rulers kill over parcels of land, and a prophesied high king is rising. But where Ragnvald is expected to bleed, and even die, for his honour, Svanhild is simply expected to marry well. It's not a fate she relishes, and when the chance to leave her stepfather's cruelty comes at the hand of her brother's arch-rival, Svanhild is forced to make the ultimate choice: family or freedom.

Drawing from the Icelandic Sagas, The Half-Drowned King tells the true story of Ragnvald of Maer, the right hand man of King Harald Fairhair, first king of all Norway, and his sister, Svanhild, as she tries to find freedom in a society where the higher her brother rises, the greater her worth as a political pawn.