The betrothed of Ambrose, bastard prince of Wessex, is kidnapped by Welsh brigands, and then a raiding party of Norse pirates. With the army of Wessex at his back, Ambrose attacks a Welsh coastal stronghold, only to find that Gretchen never made it there. He then travels to Ireland. There he meets a strange ally, and together, they work their way to the Norse stronghold where Gretchen is held. Rebuffed and then threatened by the jarl who holds her captive, he escapes and flees northward. With the aid of a Viking prince, he obtains two ships and trains Saxon ship crews so he can intercept and free his love.