Hokuto no Ken 4: Shichisei Hakenden - Hokuto Shinken no Kanata he

The world was engulfed in darkness for the third time sometime during the 21st century. With the engulfment of darkness came the spread of evil and with the spread of evil, order collapsed, and a dark age where only might makes right returned. Kenshiro, the master of Hokuto Shin Ken and man once known as the Savior of Century's End, is nowhere to be found for some reason. However, there's a young man who now follows the path of a martial artist...