Ari Thorgilsson builds a cargo ship, the Uxi, in a desperate attempt to save the family from poverty and ruin. Ari sails it out of his home in the fjords of Norway to the Orkney Islands and then into the Irish Sea, where a chance encounter makes an enemy of Ivar the Younger, a son of the Danish Viking Ivar the Boneless. While pursued by Ivar the Younger, a storm drives the ship onto the rocky coast of a hostile land, where the ship is wrecked he and the crew are captured by native Britons. Execution or enslavement seem to be their fate. But there is yet hope, for Artgal, king of the British kingdom of Alt Clut, is in need of warriors. He promises Ari a new ship if he and his companions garrison a fortress on the border with the Picts to the north, while he takes an army to fight the Angles in the east. Ari and his friends accept the offer, and plunge into a year of intrigue and battle in the depths of the land that one day will be known as Scotland, testing their mettle and their commitment to their honor. A Pictish invasion seems to spell the end of Ari's dream of a new ship. And then a fleet of Danish Vikings sails into the River Clut to lay siege to Argtal's fortress, thrusting that dream well beyond his grasp. Or does it?