It has been 50 years since humanity began its migration to the terraformed Mars, where they live in comfort thanks to advances in artificial intelligence. Carole lives in Alba City, where she works part-time during the day and plays the keyboard at night. Tuesday has fled her home in Hershell City to avoid the clutches of her wealthy family, and she hopes to pursue music with her acoustic guitar. Following a chance meeting, the two decide to perform music together. In the face of the AI singers who dominate the music world, the two of them believe that by working together, they can convey their emotions through their songs. Will the duo's hard work and luck be enough to produce the biggest miracle that Mars has ever seen?