Cat Coda, donkey Largo, dog Allegro, and hen Minuet are transformed from animals to people with alien technology to form a musical group, the Bremen 4. But when invading forces led by Colonel Presto are slaughtering their peaceful village, the musicians must band together and spread a message of peace with music, might, and a little bit of underground anti-fascist guerrilla warfare.

Hiroya Ishimaruas Alegro (voice)
Mari Okamotoas Coda (voice)
Kei Tomiyamaas Largo (voice)
Hisako Kyodaas Minuet (voice)
Nachi Nozawaas Black Jack (voice)
Chikao Ohtsukaas General Presto (voice)
Kazuko Yanagaas Rondo (voice)
Kosei Tomitaas Adagio (voice)
Makio Inoueas Colonel Karl Presto (voice)
Masako Sugayaas Trio (voice)