Gengo Matsunaga, once known as Phoenix, was the greatest samurai fire-slayer in all of Edo. After leaving fire-slaying, Gengo is approached with an offer from the Shinjo Domain. Encouraged by his wife, Miyuki, he sets out to rebuild a fallen firefighting brigade. Gengo gathers a group of misfits, the Ragged Fire-Slayers, as they investigate mysterious fires started by the arsonist Kitsunebi.