A fighter named Smash of the Dog Tribe boards a train back to his hometown after a long absence, only to find that the Elder has been kidnapped by a band of demons. After staging a rescue, Smash learns that a carefully guarded secret treasure—protected jointly by several animal Tribes—is now in serious danger. Joined by Kiri, a quick-tongued messenger of the Fox Tribe who also plays guitar, and other companions gathered along the way, Smash sets out across a world that blends medieval fantasy with steam-punk machinery to confront the threat facing them all.