Between 400 and 600 A.D., Amaterasu’s wrath dragged Ancient Japan into a time of wars, famine, and epidemics. Her disciple, Empress Imiko, rule over Japan with an iron fist and imposes terror with her mighty army. All hopes rest on two siblings, Kensei the samurai and Ayame the kunoichi, who will fight their way to bring back peace to the land. Thanks to their abilities and the people that they will meet on their journey, they will get into the imperial capital of Osaka to steal the three sacred treasures, the empress’ source of power.