After a traumatic, failed attempt to get vengeance for the death of his family, Kawa took a vow to never hold a sword against another human being again. But his dreams of a quiet, peaceful life are shattered when Nikko, an orphan boy who frequently visits his bamboo shop, gives him a letter from his relatives in the distant Wind Nation. Follow the retired ronin and his new acquaintance as Kawa ends up accompanying him on a long, heart-warming, shenanigan-filled journey.