A zero-stat girl sold into slavery by her party's sage survives a monster pit by grabbing a cursed weapon, awakening hidden power.

In the era known as Bakumatsu, there was an ishin assassin known as Hitokiri Battousai; eleven years later he returned as a wandering swordsman, Himura Kenshin.

In peaceful Bayle, Nikola encounters a dragon, is rescued by Seeker Haga. Intrigued, she explores Clayborne, her home island comprising five conflicting nations, uncovering its true nature.