When Setsu's grandfather died, so did Setsu's "sound"—his unique creative spark. Grieving, he goes to Tokyo to find himself...but manages to become totally, literally lost on his first day. Only a chance meeting with Yuna—aka Yuka, the hostess—saves him from being robbed. At first glance their lives seem totally different, but they're both striving for their dreams—hers, of being an actress, and his, of developing his talent with the shamisen—and it could just be that life in the raucous, unfeeling urban sprawl of Tokyo could just be what binds their fates together...
Year 198 of the Solar Era in Tokyo, special fire brigades are fighting against a phenomenon called spontaneous human combustion where humans beings are turned into living infernos called "Infernals". While the Infernals are first generation cases of spontaneous human combustion, later generations possess the ability to manipulate flames while retaining human form. Shinra Kusakabe, a youth who gained the nickname Devil's Footprints for his ability to ignite his feet at will, joins the Special Fire Force Company 8 which composes of other flames users as they work to extinguish any Infernals they encounter. As a faction that is creating Infernals appears, Shira begins to uncover the truth behind a mysterious fire that caused the death of his family twelve years ago.
Set in a world where the concept of music ceases to exist. the story begins when a boy encounters Myuu, a mysterious girl who possesses an audio input jack in her body. The two intermingle with the history of rock music and embark on an unforgettable journey.