As the masked vigilante Shinobi Girl, Noriko Anderson cuts a bloody trail through the financial district to stop the greed and corruption that is responsible for the poverty and death of countless victims. A woman of few words but many weapons, Noriko's determination and her sheer willpower drive her desire to save others while saving herself. However, deep inside, she wrestles with her own vulnerabilities and guilt over taking lives, even the lives of evildoers.