Four women, who have their own different sorrows, embark on a road trip. They look back at their past and restart their lives. Jinko and Motoko have been friends since their university days. One day, they hear a rumor about their former classmate and friend Miki.
When we last left the blind swordsman, he was surrounded by the grunts of Boss Kanbei that he had just killed in his final vengeance against the yakuza rivalry that had claimed the life of his friend and sent this whole series spiraling.
Several hundred years ago, humans were nearly exterminated by titans. Titans are typically several stories tall, seem to have no intelligence, devour human beings and, worst of all, seem to do it for the pleasure rather than as a food source. A small percentage of humanity survived by walling themselves in a city protected by extremely high walls, even taller than the biggest of titans.