In order to prepare for the school concert, Nobita is practicing the recorder, which he is not good at. At this time, a mysterious alien girl Mijia appears in front of him. She particularly likes the out-of-tune flute sound played by Nobita, so Mijia leads Doraemon and his friends to a music hall on an alien planet that uses music as energy. At this time, a mysterious life form that can make music disappear from the world suddenly arrives, and the earth is in crisis...! Can Doraemon and his friends save the future of music and the crisis of the earth?