The stage is Daxing Fu, the capital of the golden country, which is exhausted by the invasion of Mongolia in the 13th century. Nergui, a former slave boy who can learn all languages, lost everything in the "first air raid in history" set up by the Mongolian army. "Fight if you want freedom," with his best friend Bartle's words in mind, Nergui vows to revenge against Mongolia. His weapon is "words" and his opponent is the strongest and largest empire in history. Former slave boy's history of washing "blood" with "knowledge" Taiga spectacle opening--!