Lord Oda Nobunaga plans to control Japan where rival warlords battle by waging war against several clans. His vassal Araki Murashige stages a rebellion and promptly disappears.
Believing that the world will end that very day, three mental patients Coco, Tsumuji, and Satoru set out upon a journey. Walking upon the tops of the walls of the city, they seek to find a picnic spot with the best vantage point to view the final event.