Aliens attack the Earth. When the ClassicaLoids' attempts to communicate with musik fall flat, they place the fate of the world on Kanae and Sosuke's shoulders.
Music can recall memories, inspire action, soothe fevered minds and… summon robots? For the remixed classical maestros, or "classicaloids", a unique "musik" is their sword and shield with explosive notes that do way more than rouse emotions. Motz and Beet-san, who claim the names of timeless composers Mozart and Beethoven, are only the overture to the wacky concerto ready to awaken an unsuspecting modern town. What could go wrong?