During a catastrophe known as the Great World Blaze, mass
spontaneous human combustions caused fires that killed half the world's population. During and after the event, some humans developed
pyrokinetic abilities and became known as the Burnish. Thirty years later, Galo Thymos is a resident of the city of Promepolis and a member of the
firefighting group Burning Rescue, which responds to incidents involving the Mad Burnish, a group of radical Burnish accused of being terrorists. As Galo defeats the Mad Burnish, including their leader, Lio Fotia, the Freeze Force, a police force owned by the city's governor, Kray Foresight, arrests them. However, Lio and the other prisoners break free and escape to a cave near a frozen lake, where Galo witnesses Lio failing to revive a mortally injured Burnish using a
mouth-to-mouth flame transfer technique. Before they escape, Lio tells Galo that Kray is capturing Burnish for
human experimentation, which shocks Galo, who worships Kray after he saved him from a fire several years ago. Galo confronts Kray, who informs him that Earth will soon be destroyed by an uncontrollable surge of magma from its core and that the Burnish's abilities can be used to create a
warp drive, which he intends to use to flee Earth with a select portion of humanity. Galo opposes this plan, but is arrested for
treason. Meanwhile, Freeze Force manages to track down and recapture all of the Burnish population except for Lio, whom his companions send into a nearby volcano. Enraged by the mistreatment of his people, Lio unleashes his hatred and transforms into a giant flaming dragon that burns down the city with the intent of confronting Kray. Galo escapes from prison and intervenes with the help of Burning Rescue, restraining and cooling Lio enough for Galo's colleague, Aina Ardebit, to send them to the frozen lake. The flames melt the ice, revealing a laboratory run by a holographic projection of Deus Prometh, a scientist whom Kray killed. He explains that the Burnish can communicate with the Promare, a race of interdimensional flame beings who came to reside in Earth's core after a dimensional rift opened shortly before the Great World Blaze. They have a natural desire to burn, which the Burnish have inherited. The surging magma is a side effect of subjecting the Promare to pain, and Kray's experiments on the Burnish using incomplete, stolen technology are accelerating its growth. He also reveals that the collective agony caused by the Promare-powered warp drive will lead to Earth's destruction. In a
mecha of Deus' design called
Deus X Machina, Galo and Lio return to Promepolis to confront Kray. In the ensuing battle, the ship and warp drive are seemingly destroyed. Kray reveals that he is a Burnish and that he indirectly started the fire he rescued Galo from, using publicity from the event to launch his political career. He also recommended that Galo join Burning Rescue in the hopes that he would be killed on the job. Kray seemingly kills Galo and takes Lio to use him to power the warp drive, but Lio's flame saves Galo. Using a drill Prometh designed, Galo reaches the ship's core in time and defeats Kray using Lio's flame. While Lio is nearly killed due to the warp drive, Galo revives him using the mouth-to-mouth technique. After fusing with Earth's core, Lio convinces Galo to combine the drive with the mecha to protect life on Earth. The Promare envelop the surface, allowing them to burn completely and harmlessly and satisfying their natural urge, causing the rift in the core to close. The Burnish become normal humans, and Galo and Lio resolve to rebuild the world together. ==Voice cast==