Gensei Kitan: Disc Saga III is set in a fantasy world with both medieval and steam-punk elements. The player controls an enthusiastic fighter named Smash from the Dog Tribe. He takes the train to return to his home town after a prolonged absence. The Elder was kidnapped by a mysterious group of demons. After having rescued him, Smash learns about a secret treasure that is protected by various animal Tribes and is now in a grave danger. On his journey Smash hooks up with the lovely messenger of the Fox Tribe, the female guitarist Kiri, and other companions who will help him defeat the evil.