The story is set in Edo in 1842, the thirteenth year of the Tenpō era. Government reforms have banned all luxuries, including plays, performances, inventions, and fireworks. Despite the political climate, Seikichi, a young fireworks maker, dreams of making a huge firework the likes of which have never been seen. But every time he fires a test rocket, he finds himself pursued by government officials. One night, a blue monster and a white monster are fighting in the woods, battling each other and battling a group of human warriors. The blue monster gains the upper hand, but is distracted by Seikichi's rocket, and allows the white monster to escape. The next day, a beautiful, mysterious girl appears before Seikichi, and asks him to make a firework that will reach the moon.