In the third year of the Bunkyuu era, during the closing days of the Tokugawa shogunate. In an era of upheaval where various ideologies surged. One winter night, a certain tragedy strikes a pair of ordinary siblings who had been running a dojo in the capital city. The ones behind it were a group of men with white hair and red eyes, like that of a monster. To get her revenge for the sake of her older brother who had gone missing as a result of protecting her, the young girl takes the sword and steps further into troubled times. A group of men, who all highly showcase their will regardless of the circumstance, appear before the young girl in this era of chaos and disorder. The darkness of the era right before their eyes… With a newfound will in her heart, the young girl conceives a dawn to the darkness of the era. [Translation of the official website's story summary.]