The sacred mysteries essential to Viking survival will be lost if Inge Andersdottir cannot find a daughter to inherit the ancient wisdom. Inge and her husband Karl-Eirik adopt Thora, a young thrall with skaldic (poetic) powers and more. Thora kills a glasscaster and the king condemns her to Lesser Outlawry: a long season of exile to the rivers of Russia and then Istanbul—on Karl's boat, The Seafarer. Reluctantly, Inge agrees to go along and finds a stormy voyage—a grueling portage, an encounter with the Overlord of Kiev, her former lover, with a suspected Greek spy and an attack by the savage Pechenegs. The crew must deal with an unexpected change in captains. Thora is captured and put into an Arab harem. It is up to Inge and her wondrous skills to save the boat, the crew and her daughter.