In Tokyo, cases of self-ignition have become more frequent. The causes of this phenomenon are unknown; people do not die, but turn into fire-people, brainless monsters, who become the source of even larger fires. To fight them, fire brigades have been formed, which are also trying to determine what is causing all this. Shinra Kusakabe joins such a unit. He is believed to be responsible for the death of his own family, and, to prove otherwise, the young man strives to become a hero who will be respected and not feared.