Fena and the crew head towards Libar-Oberstein after having escaped their pursuers. They seek the manufacturer of the mysterious stone. Fena, facing the guilt of having caused Yukimaru to be injured, seeks training on how to fight.

After they are trapped in the mine, Yukimaru and the Samurai have to plan their escape so they can go after the kidnapped Fena who has been taken to a Royal Navy ship.