The story focuses on the returning hero, swordsman Hidemitsu Samanosuke Akechi, who is in his quest to defeat his nemesis, Nobunaga Oda, who wishes to conquer Japan with his army of demons known as Genma. However, Samanosuke changes places with a French officer from the future named Jacques Blanc, and both have to adapt to their new worlds to get rid of Nobunaga and the Genma.