A prequel to the Street Fighter franchise of games about a young Akuma (whose real name before giving into the Stasui No Hadou was Gouki in this version) and his brother Gouken. The storyline involves the breaking relationship between the two brothers while competing in a world fighting tournament as well as fighting a conspiracy involving a shady scientist named Dr. Sadler and a clan of ninja assassins called the Geki. Other classic characters who appear are Retsu and Oro.