Anime Series - In the wastelands following the great nuclear war, a legend grew of a man. Hokuto No Ken - The Fist of the North Star. Master of a legendary fighting technique. A man of impossible strength and endurance. Yet before Ken claimed the title of the Fist, there was another master, trained in the art of Hokuto Shinken, the King of the Fist, the Divine Fist of Heaven. Raoh: the ultimate assassin, the ultimate warrior.
http://www.theanimenetwork.com/shows/legends-of-the-dark-king-a-fist-of-the-north-star-story