The Roman Empire is in ruins and civilization is sinking back into barbarism. The noble Celtic druids have been decimated by the Emperor's legions, but one remains. His task is to be a catalyst at this juncture of history when darkness threatens to overshadow the world. In the East, the darkness has a name -- Attila the Hun. From the lands of ice, the Vikings wreck havoc on the island peoples. But so do their gods, Odin and the warriors of Valhalla. A Roman centurion is shipwrecked on a mysterious isle and encounters a druid's daughter, shimmering with beauty and mysterious talents. Fate will take them into the depths of the Celtic Otherworld and across the continents to change the course of history.They join forces with Patrick the Briton, some day to be known as Saint Patrick, who faces the forces of darkness on his mission to the Celtic isles. The humble monk with mystic powers faces his enemies led by Lochru, chief magi of the High King of Eire, and Coroticus, the pirate ruler of Dumbarton.They seek the holy man's death at all cost in an ultimate encounter foretold from ancient days and known as Ragnarok, the Day of Destruction.